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Heidi’s Legacy: Mountains CallingPATCH 2026.10.18

Heidi’s Legacy: Mountains Calling System Requirements for PC and Steam Deck

By VGSources Team 8 min read

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Heidi’s Legacy: Mountains Calling should run on modest Windows and SteamOS/Linux hardware, while macOS requires a newer baseline and more memory. The official Steam listing specifies Windows 10, macOS 11 or later, and SteamOS/Linux configurations, with a planned December 2026 release and a downloadable demo already available. The game is unreleased, so these specifications and Steam Deck compatibility information can change before launch.

Official system requirements at a glance

The following specifications are taken from the official Steam store listing accessed on October 16, 2026. They describe operating-system support, hardware tiers and storage needs, not guaranteed frame rates or image-quality settings.

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Windows PC

Component Minimum Recommended
Operating system Windows 10 Windows 10
Processor Intel Core 2 Duo Intel Core i3
Memory 4 GB RAM 8 GB RAM
Graphics Integrated graphics, such as Intel HD 3000 Dedicated graphics, such as NVIDIA GTX 650
Graphics API DirectX 11 DirectX 11
Storage 300 MB available space 300 MB available space

macOS

Component Minimum Recommended
Operating system macOS 11 or later macOS 12 or later
Processor Intel Core i5 or Apple M1 Apple M1 or Intel Core i7
Memory 8 GB RAM 16 GB RAM
Graphics Intel Iris or AMD Radeon Pro Apple Silicon GPU or AMD Radeon Pro 5300M
Storage 400 MB available space 400 MB available space

SteamOS and Linux

Component Minimum Recommended
Operating system SteamOS or Ubuntu 20.04, 64-bit SteamOS or Ubuntu 20.04, 64-bit
Processor Intel Core 2 Duo Intel Core i3
Memory 4 GB RAM 8 GB RAM
Graphics Integrated graphics, such as Intel HD 3000 Dedicated graphics, such as NVIDIA GTX 650
Storage 300 MB available space 300 MB available space

Steam lists the Windows and SteamOS/Linux tiers with the same processor, memory, graphics and storage targets. macOS has a different baseline: it starts with a newer processor class, requires more memory at minimum and uses a 400 MB storage figure.

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What the Windows requirements mean

The minimum tier targets older PCs

A Core 2 Duo, 4 GB of memory and Intel HD 3000-class integrated graphics identify a very low hardware floor by modern PC standards. Meeting that list means the game may launch on an older Windows 10 computer, but it does not establish a particular frame rate, resolution or visual preset. Integrated graphics share system memory, and background applications can reduce the resources available to the game.

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DirectX 11 is required in both Windows tiers. A computer that can run Windows 10 but lacks a functioning DirectX 11-capable driver can still fail to start. Install the graphics driver supplied by the GPU or laptop manufacturer and apply pending Windows updates before diagnosing the game itself.

The recommended tier is still modest

Steam’s recommended Windows target is an Intel Core i3, 8 GB of RAM and a dedicated GPU in the NVIDIA GTX 650 class. The recommendation indicates more room for the game’s exploration, dialogue, crafting and village-simulation systems than the minimum tier, but it is not a benchmark promise. The store page does not publish expected frames per second, resolution targets or settings presets.

Storage is small, but not a performance guarantee

The listing asks for 300 MB of available space on Windows. That is an unusually small install footprint for a current PC release, but it should be read as the published requirement for the listed build. Leave additional free space for patches, shader caches, save files and the downloadable demo; the store page does not state how large future updates will be.

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How macOS support differs

Apple Silicon and Intel are both listed

The minimum macOS entry supports either an Intel Core i5 or Apple M1, while the recommended entry names Apple M1 or Intel Core i7. This is explicit support for both processor families rather than an Apple-Silicon-only requirement. Check the processor architecture of an older Mac before assuming that every macOS 11-compatible model is suitable.

Memory matters more on Mac

macOS lists 8 GB of RAM as the minimum and 16 GB as recommended. Those figures are higher than the corresponding Windows and Linux tiers. On Apple Silicon systems, the GPU uses unified memory, so leaving browser tabs, video software and other large applications open can reduce the practical headroom available to the game.

Graphics and storage

Minimum graphics include Intel Iris or AMD Radeon Pro; the recommended entry names an Apple Silicon GPU or AMD Radeon Pro 5300M. The required storage is 400 MB in both macOS tiers. The page does not identify a Metal version, frame-rate target or resolution target, so those details should not be inferred from the hardware examples.

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SteamOS, Linux and Steam Deck

Why the Linux listing matters for Deck owners

Steam lists SteamOS and 64-bit Ubuntu 20.04 in both Linux tiers, with the same CPU, memory, graphics and storage targets shown for Windows. That makes the Linux requirements directly relevant to a Steam Deck, whose operating system is based on SteamOS. SteamDB records Linux support and full controller support for app ID 3589430 at its configuration page.

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No title-specific Verified or Playable badge is established

The available store evidence does not show a game-specific Steam Deck Verified or Playable badge. Valve’s Steam Deck Verified criteria evaluate details such as default-resolution support, default settings and legible text; they are separate from the game’s raw PC requirements. Because the badge is not established here, do not treat the Linux table as a promise that every Deck model will receive a particular rating.

The requirements are light enough to make Steam Deck a plausible platform, and the listing records controller support, but that is a reason to test the demo rather than a substitute for a compatibility badge. Recheck the store page and recent player reports near the December 2026 release.

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What to check on a Deck

  1. Open the game’s Steam store page on the Deck and inspect the current compatibility indicator beneath the purchase or installation area.
  2. Install the downloadable demo when available to your account and test launching, text readability, controller navigation, saving and returning from suspend.
  3. Use the default graphics profile first. If the game offers a resolution or quality menu, change one option at a time so you can identify which setting affects stability.
  4. Report reproducible problems through the game’s Steam community or developer channels, including your Deck model, SteamOS version and whether the issue occurs in the demo or full release.

PC versus Steam Deck: practical differences

Comparison point Windows PC Steam Deck
Operating system Windows 10 is listed for both tiers. Uses SteamOS; the game also lists SteamOS/Linux support.
CPU and GPU requirement Minimum and recommended examples are published directly in the Windows table above. No Deck-specific CPU/GPU target or performance profile is published.
Memory Use the Windows minimum or recommended tier as the reference. The Linux listing supplies the relevant software target, but the store page does not provide a Deck-specific memory allocation.
Storage The Windows listing specifies 300 MB. The SteamOS/Linux listing also specifies 300 MB; actual free space available to a Deck depends on the drive and other installed content.
Controls Keyboard and mouse support is not detailed in the requirements panel. SteamDB records full controller support.
Verified status Not applicable to a Windows PC. No title-specific Verified or Playable badge is established in the accessed evidence.

This comparison separates what the listing actually confirms from what still needs testing. A Windows computer can be checked against named processor and graphics examples; a Deck owner should use the demo and the current compatibility indicator because there is no published Deck performance target.

How to check whether your computer meets the list

Windows 10 or 11

  1. Open Settings > System > About and note the processor model and installed RAM.
  2. Open Task Manager > Performance and select GPU to identify the graphics adapter. Compare it with the integrated-versus-dedicated category in the Steam table, not only the brand name.
  3. Press Windows key + R, enter dxdiag, and check the Display tab for the installed driver and DirectX information.
  4. In File Explorer, right-click the destination drive and choose Properties to confirm at least the published free-space figure, while keeping extra room for updates.

macOS

  1. Choose Apple menu > About This Mac to see the macOS version, chip or Intel processor and installed memory.
  2. Open System Settings > General > Storage to check free space.
  3. Choose Apple menu > About This Mac > System Report and open Graphics/Displays if you need the exact GPU name.
  4. Compare the result with the macOS table, paying particular attention to the 8 GB minimum and 16 GB recommended memory levels.

SteamOS or another Linux distribution

  1. On Steam Deck, open Settings > System and record the SteamOS version and available storage; on desktop Linux, use your distribution’s system-information panel or hardware tools.
  2. Confirm that the installation is 64-bit when using Ubuntu, because the listing specifies Ubuntu 20.04 64-bit rather than a generic Ubuntu release.
  3. Install current graphics drivers and run the demo before purchasing the unreleased full game.
  4. Check the store page again after major SteamOS or game updates, since compatibility labels and Proton-related behavior can change.
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Release status, demo and changing requirements

Steam lists a planned release in December 2026. The full game is not yet available, but a downloadable demo is offered. The store description calls it “a cozy narrative sim where you care for goats, craft mountain goods, and help villagers rebuild their lives.” Its systems include branching dialogue, relationships, goat care, crafting, exploration, fishing and village rebuilding.

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Because the game is still in development, the requirement panel is a snapshot rather than a permanent contract. Check the Steam listing immediately before launch for altered operating-system versions, hardware examples, storage needs or a newly assigned Deck compatibility badge. The demo can reveal launch and control problems on your particular machine, but performance in a demo should not be presented as a guarantee for the final build.

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Engine change and what it does—and does not—tell you

Developer updates say the team moved from Godot Forward+ to Compatibility mode to support a wider range of systems and that the demo ran more smoothly on more machines after the change. This is a developer statement about an implementation decision, not an independent benchmark. It supports the expectation of broad hardware targeting, but it does not establish a specific frame rate, battery life, loading time or graphics preset.

Troubleshooting when a system appears to qualify

The game will not launch

  • Verify that Windows, macOS or Linux matches the supported version family and architecture shown in the relevant table.
  • Update the GPU driver or operating system, then restart before testing again.
  • On Windows, run dxdiag and confirm that the graphics device is detected without a driver error.
  • On Linux or SteamOS, verify that the game is using the intended graphics driver and that the installation is not corrupted.

Stuttering or unstable performance

  • Close browsers, recording tools and other memory-heavy applications.
  • Start with the game’s default settings and lower resolution or visual effects only if those controls are available.
  • On integrated graphics, make sure the laptop is connected to power and using its high-performance profile where applicable.
  • Compare the behavior in the demo and note whether the issue follows a particular area, menu or save file before contacting support.

Insufficient storage

Free the published installation space plus a buffer for updates and temporary files. If the store client reports a larger requirement than the table, use the client’s current figure; unreleased games can change package size between builds.

Bottom line for each platform

  • Windows: The listed floor is an older Core 2 Duo system with integrated graphics, while the recommended target remains a Core i3 and GTX 650-class dedicated GPU.
  • macOS: Support covers Intel and Apple Silicon, but the memory requirement is higher than on Windows or Linux.
  • SteamOS/Linux: The published tiers mirror Windows and make the game a reasonable Deck candidate.
  • Steam Deck: Controller support and modest Linux requirements are encouraging, but no game-specific Verified or Playable badge is established. Test the demo and recheck the store page near release.
  • Timing: The full release is planned for December 2026, so treat every listed specification as subject to change.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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