Command & Conquer: Generals – Zero Hour is the 2003 expansion for Command & Conquer: Generals, not a remaster or originally a standalone game. In 2026, the safest way to play it on Windows 10 or Windows 11 is to buy an official Steam or EA App copy, install both Generals and Zero Hour, launch each once, and then run the community-maintained GenPatcher. For current online multiplayer, use GeneralsOnline; EA’s original online service is no longer offered.
- Best new purchase: Steam, especially if you want Workshop maps and separate library entries.
- Best for existing EA owners: the EA App version of The Ultimate Collection.
- Best complete installation: install the base game and Zero Hour together, even though the modern Steam packaging may launch some Zero Hour skirmish content without the base-game app.
- Best Windows 10/11 compatibility step: apply GenPatcher after the first launch.
- Best current multiplayer route: GeneralsOnline, not the older C&C:Online instructions found in many legacy guides.
What is Command & Conquer: Generals – Zero Hour?
Command & Conquer: Generals is the 2003 real-time strategy game built around three factions: the United States, China, and the Global Liberation Army. Zero Hour is its expansion pack. It uses the original game’s early-2000s 3D SAGE engine, so modern storefront integration and compatibility utilities have been added around an old game rather than replacing it with a modern engine.
The expansion adds three campaigns with 15 missions, the Generals Challenge mode, nine specialised generals—three for each faction—new units, 20 upgrades, new maps, skirmish content, multiplayer features, and the World Builder level-editor ecosystem. Examples of its new units include China’s ECM Tank, the GLA Battle Bus, and the USA Spectre Gunship. The original expansion description is preserved by C&C Labs, while the current Steam listing documents the modern digital release.
That makes Zero Hour more than a small content add-on. Generals Challenge gives the factions distinct opponents and strategies, the new units significantly change army composition, and the extra maps and editor support are a major reason the game remains active in skirmish, custom-map, modding, and multiplayer communities.
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- A familiar control layout that doesn't require a learning curve to be able to use, with all the same buttons as on an Xbox 360.
- The unique floating D-pad rests on four switches-instead of a single pivot point-making it responsive to quick changes in direction.
- The six-foot cord lets you lean back and play a comfortable distance from your PC monitor.
Is Zero Hour standalone?
Historically, no. Zero Hour was sold as an expansion and its original installation documentation says that Command & Conquer: Generals is required. It was not a remake, a remaster, or an independent sequel. Older packages such as Generals Deluxe Edition and The First Decade bundled the base game and expansion together, which is why older players may remember installing them as one collection.
Modern Steam packaging makes the answer more complicated. Since its March 7, 2024 Steam release, Zero Hour has its own purchasable Steam app. Community reports indicate that some owners can launch and play certain skirmish content without installing the separate base-game app. That does not erase the expansion’s historical dependency, nor does it prove that every campaign, mod, editor, or community tool works independently.
The practical answer is therefore:
Zero Hour was originally an expansion requiring Generals. Today it has a separate Steam listing and may run some content without the base-game app, but install both games for the complete experience and the fewest compatibility surprises.
The original requirement is described in the original installation guide. The modern Steam behaviour is based on the separate app packaging and user reports, not on a clear EA statement that Zero Hour has been converted into a fully independent game.
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Steam: the best choice for most new players
Steam now lists Zero Hour as an individual purchase and also includes it in Command & Conquer: The Ultimate Collection. The current Zero Hour Steam page lists Windows 10 as the minimum operating system and provides the separate library entry that older buying guides often incorrectly say does not exist.
Steam is the strongest general recommendation if you are starting from scratch because it offers:
- Separate Generals and Zero Hour entries when purchased individually or through the collection.
- Official Steam Workshop support for user maps.
- Steam library integration and Steam Cloud support where provided by the listing.
- Frequent bundle discounts, although prices vary by region and sale period.
- Compatibility with current community tools after the installation has been patched.
Do not rely on a permanently quoted price. The individual game and the collection are frequently discounted, and the displayed price depends on region, tax, and sale timing. Check the live Steam page before purchasing.
EA App: best if you already own the collection there
EA’s current PC storefront presents Zero Hour as part of Command & Conquer: The Ultimate Collection, rather than as a separate EA App product. The collection contains the classic Command & Conquer games and expansions and is available for Windows through EA’s current Ultimate Collection page.
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What about old discs, keys, and downloads?
An original physical disc is legitimate, but it is not automatically the easiest modern solution. Disc-based installers use legacy installation and copy-protection technology and may require more work on Windows 10 or Windows 11 than a current digital copy. Do not buy an expensive old disc on the assumption that it is more compatible.
Old key marketplaces are also a poor recommendation. Keys may be invalid, already redeemed, region-restricted, or tied to a distribution method that no longer works as expected. Avoid unauthorised repacks advertised as a special Windows 10 or Windows 11 edition. The reliable route is an official Steam or EA purchase, followed by community compatibility fixes.
Steam versus EA App
| Consideration | Steam | EA App |
|---|---|---|
| How Zero Hour is sold | Separate app and part of the Ultimate Collection bundle | Presented as part of the Ultimate Collection |
| Workshop | Official Workshop support for user maps | No equivalent Steam Workshop layer |
| Best use case | New buyers, Workshop users, and players who want separate library entries | Players who already own the EA/Origin collection |
| Launcher | Steam client; EA account requirements may still apply to some EA services and terms | EA App |
| Compatibility | Needs the same modern community fixes; digital builds may use the newer 1.05 executable | Also benefits from GenPatcher and may have launcher-specific detection issues |
| Online play | Neither storefront restores EA’s discontinued official service; use a current community service or compatible tool | |
Do not confuse the number of entries shown in the Steam collection with EA’s description of the collection’s contents. EA describes the original Ultimate Collection as 10 base games and seven expansions, while Steam presents 12 package entries, with some entries bundling a game and its expansions. Those are different ways of counting the same broad catalogue, not necessarily different collections.
Windows 10 and Windows 11 compatibility
Zero Hour is usually playable on current Windows systems, but “playable” does not mean that the game was modernised. The Steam listing gives a minimum of Windows 10, 1 GB of RAM, a 2.2 GHz Intel or AMD processor, an old GeForce 4 or Radeon 8500-class graphics card, and 3 GB of storage for the Zero Hour entry. Those are historical storefront requirements, not a guarantee that every Windows 11 display, driver, launcher, or mod will work without adjustment.
EA’s original requirements target much older Windows versions and hardware, so they should not be read as current support promises. In practice, the most useful Windows 10/11 guidance comes from community compatibility projects such as C&C Community’s installation guide and GenPatcher. This is community support, not an official EA Windows 11 certification.
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- Rumble vibration.
- Support turbo function.
Typical problems include:
- Crashing before the main menu.
- A false
DirectX 8.1 or higher
error even though modern DirectX is installed. - Black screens or crashes when entering exclusive fullscreen.
- A missing or incorrectly generated
options.ini. - Incorrect resolution, stretched HUD elements, or poor high-DPI behaviour.
- Stuttering or slowdowns on some modern systems.
- The game choosing an integrated GPU instead of a discrete GPU.
- Save files appearing to vanish because Documents was redirected by OneDrive.
- Multiplayer version mismatches caused by different executables, patches, or mods.
The important version distinction: 1.04 versus 1.05
Version numbers matter because many older mods and multiplayer utilities were built around the traditional retail executable.
| Version or build | What it means | Why it matters |
|---|---|---|
| Zero Hour 1.04 | The traditional final retail-compatible patch | Required by many older mods, GenTool setups, and legacy multiplayer tools |
| Zero Hour 1.05 | The newer Steam/EA digital build associated with the 2025 update | Adds modern digital-era functionality, but may not work with every 1.04 tool or mod |
| Community patches | Unofficial changes to executable, data, balance, networking, or compatibility | Can solve modern problems while making a setup incompatible with another player |
| GeneralsOnline build | A community multiplayer-oriented project based on EA-released source-code work | Provides current online features but is not the original EA retail executable |
The modern digital build is commonly identified in-game as 1.05, while the corresponding newer base-game build is commonly identified as 1.09. EA’s February 27, 2025 announcement focused on Workshop support and source-code release rather than publishing a conventional, exhaustive patch-note list. Treat 1.05 as a different compatibility target, not automatically as a universal replacement for 1.04.
GenPatcher can install or restore the traditional 1.08 Generals and 1.04 Zero Hour executables and apply related fixes. The correct choice depends on your goal:
- Use the modern digital build when you prioritise the current storefront and its newer functionality.
- Use a 1.04-compatible setup when a specific older mod, GenTool version, or legacy multiplayer environment requires it.
- Never assume that changing the executable is harmless. Back up a clean installation before testing patches or total conversions.
Recommended clean installation for Windows 10/11
- Buy an official copy. Use Steam or the EA App. For the least confusing full setup, install both Command & Conquer: Generals and Command & Conquer: Generals – Zero Hour.
- Launch both games normally once. Start them from the storefront launcher, wait for the main menu, and exit. This gives the launcher and the game an opportunity to create registry entries and user-data folders.
- Download GenPatcher from its official site. Use Legionnaire’s GenPatcher page, not a mirror or repackaged installer. The utility advertises support for Steam, EA App, Origin, The First Decade, CD, and ISO installations.
- Run GenPatcher and let it detect the installation. Choose Apply Fixes. Its current fix set can install legacy Visual C++ x86 runtimes, the June 2010 DirectX runtime, fixed executables, registry entries, an optimised
options.ini, shortcut repairs, high-resolution fixes, and Steam/EA detection fixes. - Restart and test the unmodified game. Check the main menu, one campaign mission, skirmish, save/load, and the display resolution before adding mods or injected tools.
- Add GenTool only if you need it. GenTool provides widescreen and display features, extended zoom, replays, screenshots, anti-cheat functions, and support for older online environments. It is not required for basic offline play.
- Add GeneralsOnline separately for current multiplayer. Keep the standard game available for campaigns, skirmish, and mods, and use the community client for online play.
GenPatcher also checks common causes of failure such as missing registry entries, invalid installation paths, a redirected Documents folder, read-only attributes, and OneDrive-related data-folder discrepancies. It is a community utility, not an EA product.
GenPatcher and antivirus warnings
GenPatcher’s developer says antivirus products can flag the program because it changes registry entries, moves or deletes files, and applies executable fixes. The C&C Community guide repeats the advice that protection may need to be paused temporarily during installation. That is an attributed developer/community explanation, not independent proof that every file carrying the GenPatcher name is safe.
Use a cautious process:
- Download only from the official GenPatcher website.
- Scan the download before running it.
- Temporarily pause real-time protection only if the official installer cannot complete without it.
- Re-enable Windows Security immediately after the operation.
- Do not trust an unknown download simply because it produces a similar antivirus warning.
- Do not permanently disable antivirus protection.
Troubleshooting common launch and display problems
“Please make sure you have DirectX 8.1 or higher installed”
This message usually does not mean that your PC lacks a modern DirectX version. Zero Hour uses old detection logic and may be missing legacy runtime components or encountering a conflicting DLL.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors- Run GenPatcher and apply its fixes.
- Install the June 2010 DirectX runtime components through GenPatcher or Microsoft’s official legacy runtime package.
- Open the Zero Hour installation folder and look for
dbghelp.dll. - If the error remains, rename it temporarily to
dbghelp.dll.bakand test the game. - Restore the original filename if this does not help.
- Test without GenTool or other injected DLLs, because a third-party wrapper may be the conflicting component.
GenPatcher specifically lists the June 2010 runtime and the dbghelp.dll workaround among its fixes. The workaround is a diagnostic step, not a reason to delete system files.
Serious error or crash before the menu
First check whether the game created its user-data folder and options.ini. Then work through this list:
- Check the Documents location for a folder named
Command and Conquer Generals Zero Hour Data. - Look in both the normal Documents directory and any OneDrive Documents directory, but do not delete either folder until you identify which contains your active saves and settings.
- Make sure the game directory and its user-data directory are not read-only.
- Check whether antivirus software quarantined a patched executable or DLL.
- Remove or disable an old mod, custom control bar, or injected graphics file.
- Run GenPatcher again and allow it to check the installation path, registry entries, and data-folder configuration.
- If the installer came from an unsupported, damaged, or unauthorised source, replace it with a clean official installation rather than layering more fixes onto it.
Black screen, fullscreen crash, or Alt+Tab failure
Exclusive fullscreen is one of the game’s least reliable behaviours on current Windows. Try windowed mode first, use the windowed shortcut generated by GenPatcher, or use GenTool’s borderless fullscreen mode. Avoid Alt+Tab from the old exclusive-fullscreen mode.
Borderless mode can make the game easier to switch away from, but the C&C Community guide warns that it disables edge-based camera scrolling. If you depend on moving the pointer to the edge of the screen to pan the map, windowed mode or a different display configuration may be preferable.
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Stuttering or frozen loading on a Steam installation
Recent 2026 community reports describe sudden stuttering and frozen loading screens on some Steam installations. Those reports do not establish one universal cause; display configuration, fullscreen behaviour, Windows changes, and the legacy rendering path are all possible contributors. Windowed launch options helped some users, but this is not an official EA or Microsoft diagnosis.
Test the simplest option first:
-win
In Steam, use Library → right-click Zero Hour → Properties → General → Launch Options. If windowed mode helps but the size is wrong, test a resolution explicitly:
-win -xres 2560 -yres 1440
Replace the numbers with your display’s actual resolution. This is a community workaround, not a guaranteed fix or an official Steam command-line specification. Remove the options again if they make the problem worse.
The game uses the integrated GPU
On a laptop or a desktop with multiple graphics adapters, Windows may assign the old executable to the low-power GPU. In Windows 11, open Settings → System → Display → Graphics, add the relevant game executable if it is not listed, open Options, and test High performance. Driver control panels may provide a similar per-application setting. This can help with rendering problems, but it will not repair missing runtimes or an incompatible mod.
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Save files are missing or the game keeps forgetting settings
Modern installations normally store user data outside the installation directory, usually under:
DocumentsCommand and Conquer Generals Zero Hour Data
The folder may contain:
options.inifor display and game settings.- Save games.
- Replays.
- Custom maps.
- Profiles and other user settings.
The exact path can vary with language, Windows account, permissions, OneDrive redirection, and the storefront build. If you have more than one similarly named folder, open each one and identify the folder containing your current saves before changing or deleting anything. GenPatcher’s support checks specifically address OneDrive and unstable Documents paths.
GenTool says the executable is unsupported or multiplayer reports a mismatch
This often means that the game is using the newer 1.05 digital executable while the tool or opponent expects the traditional 1.04 version. It can also result from a modded executable or an outdated GenTool installation.
- Confirm the game’s version and whether it is a clean installation.
- Update GenTool from its official site.
- Run the current GenPatcher.
- Check the mod or multiplayer service’s required executable version.
- If necessary, use GenPatcher to restore a 1.04-compatible executable.
- Do not mix executable patches, total-conversion files, and online clients until each works independently.
Steam users reported that the 2025 digital build changed executable compatibility and temporarily broke some GenTool setups. Later GenPatcher updates added Steam support and a path to restore compatibility, but individual mods and tools can still impose their own requirements.
Online multiplayer in 2026
EA’s original servers are not available
Do not follow an old guide that implies EA still operates the original Generals or Zero Hour online service. EA’s current Ultimate Collection page says that the official online features for these classic titles are no longer offered.
GeneralsOnline is the current route
GeneralsOnline is the most important current service for Zero Hour multiplayer. Its project describes itself as a community-made modernisation of Zero Hour’s online services based on the SuperHackers fork of EA’s released source code. It is independent of EA and is not endorsed or affiliated with EA.
According to the project, GeneralsOnline provides:
- Steam and EA App support.
- No requirement for GameRanger, Radmin, Hamachi, or manual port forwarding.
- Automatic updates.
- Quickmatch and original GameSpy-style functionality.
- 60 Hz multiplayer.
- Improved connection success and stability.
- Login through Steam, Discord, or GameReplays.
- Custom-map support.
- An installation that can sit beside the existing game without modifying the standard installation.
The project also advertises infrastructure in hundreds of cities and more than 125 countries and lists quality-of-life and stability updates in 2026. These are the project’s own current claims and can change; check its patch notes and main site before installing.
GeneralsOnline setup
- Install a legal Steam or EA App copy of Zero Hour.
- Launch the game once and close it.
- Download the installer from playgenerals.online.
- Point the installer to the Zero Hour installation containing
Generals.exe. - Launch GeneralsOnline from its desktop shortcut.
- Allow it through Windows Firewall when prompted.
- Log in through Steam, Discord, or GameReplays.
- Use the standard game for campaigns and offline play, and GeneralsOnline for current multiplayer.
Do not assume that every 1.04 mod, 1.05 digital build, or 60 Hz modification is compatible with every opponent. A 60 Hz modernisation is a separate compatibility choice and may not work with older tools or players using the original timing model.
What happened to C&C:Online and where does GenTool fit?
Older guides commonly recommend C&C:Online, also associated with Revora, for Generals and Zero Hour. That advice is now incomplete: C&C:Online’s own download page says that its Generals and Zero Hour services are being retired, with coverage transferring to GeneralsOnline. Treat C&C:Online instructions as historical unless its current project pages say otherwise.
GenTool remains useful for widescreen and display features, extended zoom, replays, screenshots, anti-cheat features, and older C&C:Online or GameRanger-oriented setups. Its site lists support for Generals 1.08 and Zero Hour 1.04, including Deluxe, The First Decade, and Ultimate Collection installations. It may not fully support every modern 1.05 executable without additional compatibility work, so it is not a universal replacement for GeneralsOnline.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Maps, World Builder, Workshop, and mods
Steam Workshop maps
EA added Steam Workshop support for user maps for Generals and Zero Hour on February 27, 2025. According to EA, subscribed content downloads when the game launches and appears in the appropriate single-player or multiplayer map-selection menus. EA also updated the Mission Editor and World Builder tools so creators can publish maps directly to Workshop. See the official EA Workshop and source-code announcement.
This is a major advantage of Steam, but do not extend the claim too far. Workshop support is primarily for maps. A total-conversion mod is not automatically a Workshop installation, and a Workshop map may still depend on a particular game build or required assets.
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Manually installing maps
For manually downloaded maps, the commonly used Windows locations are:
%USERPROFILE%DocumentsCommand and Conquer Generals DataMaps
%USERPROFILE%DocumentsCommand and Conquer Generals Zero Hour DataMaps
Use the Zero Hour folder for Zero Hour maps. The exact path can differ by version, language, Windows account, and OneDrive configuration. C&C Labs’ map-installation guide documents the usual Windows 10/11 locations.
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Full mods and clean installations
There are several different kinds of community content:
- Workshop maps: the simplest Steam-supported content.
- Loose-file mods: files copied into the game directory or user-data folder.
- Total conversions: larger projects that may require a separate launcher or a clean installation.
- Balance and community patches: changes that can alter executable files, game data, networking, or faction balance.
- GenLauncher-managed mods: supported mod packages that GenLauncher can download and maintain.
Read the mod’s required version before installing it. A mod designed for retail 1.04 may fail on the 1.05 Steam/EA build. Some modifications also make the installation incompatible with unmodified multiplayer players. Keep one clean installation for vanilla play and make a backup or separate installation for experiments where practical.
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EA warns that older community content may need adjustment for modern Steam builds. Its modding guidance also says that community mods are not pre-screened, endorsed, or specifically supported by EA. See the EA modding FAQ before treating a Workshop item or external download as official.
What the 2025 source-code release does—and does not—mean
On February 27, 2025, EA released recovered source code for Generals and Zero Hour under GPL terms and released additional source files to support Workshop and modding. The official EA source repository is valuable for developers and community projects, but it is not a free replacement for the commercial game.
The repository states that users must own the game to use compiled binaries and that the source release omits or depends on various third-party libraries and SDKs. The source code does not include an unrestricted free distribution of all commercial game assets. In other words, downloading source code does not legally turn Zero Hour into a free standalone download.
Technically inclined players can also examine the active SuperHackers community code fork and its GeneralsGamePatch project. These projects focus on fixes, modernisation, and improved multiplayer, but they remain community projects requiring an original installed copy and are not official EA remasters.
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| Your priority | Recommended setup |
|---|---|
| Campaigns and occasional skirmish | Steam or EA App, install both games, and run GenPatcher |
| Workshop maps | Steam, plus GenPatcher for Windows compatibility |
| You already own the EA collection | Use the EA App copy and apply GenPatcher rather than buying again |
| Competitive online play | Legal Steam or EA copy, GenPatcher as needed, and GeneralsOnline |
| Older mods | Clean 1.04-compatible setup; check every mod’s required version |
| Source-code experimentation | Own the commercial game, then explore the SuperHackers projects |
| A modern remaster | Zero Hour itself has not become a modern remaster; community projects are experimental or multiplayer-focused |
Before asking for help: record your installation details
Many Zero Hour support problems are version-specific. When troubleshooting or asking a mod author for help, record:
- Windows 10 or Windows 11, including whether Documents is redirected to OneDrive.
- Steam, EA App, The First Decade, retail disc, or another legitimate origin.
- The game language.
- Whether the release is censored or uncensored.
- The displayed Generals and Zero Hour version numbers.
- Whether GenPatcher, GenTool, a custom control bar, or another DLL is installed.
- The exact mod, map, or online client involved.
International and language variants are not always handled identically by older tools. GenPatcher supports multiple language and installation types, but its support information warns that unsupported or invalid installers can fail detection. Identifying the source and version first prevents a great deal of unnecessary file replacement.
Final recommendation
For a new Windows player, buy the Steam version or Steam Ultimate Collection, install both Generals and Zero Hour, launch them once, and apply GenPatcher from its official site. Start with the clean patched game before adding GenTool, maps, or mods. Use Steam Workshop for maps, keep a 1.04-compatible copy if an older mod requires it, and use GeneralsOnline rather than outdated C&C:Online instructions for current multiplayer.
That setup preserves the original campaigns and skirmish experience while addressing the old game’s most common Windows 10/11 problems. It also keeps the important boundaries clear: GenPatcher, GenTool, GeneralsOnline, and SuperHackers are community projects; EA’s official online service is gone; and the 2025 source-code release did not make the commercial game free.
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Frequently Asked Questions
Do I need to buy Command & Conquer: Generals before Zero Hour?
For the complete, least troublesome setup, yes: install both Generals and Zero Hour. Zero Hour was historically an expansion that required the base game. The modern Steam app may launch some skirmish content separately, but that should not be treated as proof that every campaign, editor, mod, or tool works without Generals.
Will Zero Hour work on Windows 11?
It is commonly playable on Windows 11, but it was not designed for modern Windows. Steam lists Windows 10 as its minimum, while community tools such as GenPatcher target Windows 10 and Windows 11 compatibility. Expect to apply fixes for old DirectX detection, display modes, save paths, and executable compatibility.
Can I play Zero Hour online now?
EA’s original online service is no longer offered. For current multiplayer, install a legal copy and use GeneralsOnline, an independent community service that supports Steam and EA App installations. Older C&C:Online guides are no longer the best current route for Generals and Zero Hour.
Is the Zero Hour source code a free copy of the game?
No. EA released source code under GPL terms, but the official repository says users must own the game to use compiled binaries and that several third-party components are absent. You still need a legitimate game installation and should not treat the source release as an authorised free download of the commercial assets.
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Bottom line: Zero Hour remains an excellent classic Windows RTS, but the reliable 2026 setup is not simply install-and-play. Buy it officially through Steam or the EA App, install Generals with the expansion, run GenPatcher, keep 1.04 compatibility in mind for older mods, and use GeneralsOnline for current multiplayer.
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