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Fortnite v31.20 Update: Day of Doom, Aim Assist and Creator Changes

Fortnite v31.20 added the Day of Doom limited-time mode, introduced human-like controller aim assist and delivered separate Creative and UEFN updates.
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Fortnite Battle Royale v31.20 arrived on September 17, 2024, bringing the limited-time Day of Doom mode and a controller aim-assist change. Separate ecosystem updates released on September 12 added tools and fixes for Creative and UEFN creators. The update is historical: Day of Doom’s announced Discover window ended on October 4, 2024.

What changed in Fortnite v31.20?

  • Battle Royale: Day of Doom put Avengers against Doctor Doom’s forces in a mode for up to 32 players.
  • Controller aim assist: Epic introduced what it called “human-like aim assist” for controller players on console, PC and mobile.
  • Creative and UEFN: Creators received a Village project template, a Fall Guys device and stricter texture validation, alongside fixes documented in the ecosystem release notes.
  • Shop: The announcement featured Iron Man Mk 45 digital cosmetics, including an Outfit with a LEGO Style.

Epic published the Battle Royale announcement on September 17, 2024. The separate ecosystem announcement appeared on September 12, with additional technical detail in the v31.20 ecosystem release notes. Epic’s Season 31 release index lists the season as running from August 16 through November 2, 2024.

How did Day of Doom work?

Epic described Day of Doom as inspired by Endgame from Chapter 1 Season 8. Matches had up to 32 players divided between Avengers and Doom’s Henchmen. It was listed in Discover until October 4, 2024, at 9 a.m. ET; that availability window has passed.

The two sides had different objectives and equipment. Epic said, “In Day of Doom, up to 32 players will join the ultimate battle between good and evil.”

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#1 Best Overall
Fortnite eGift Card
  • Redeemable on accounts in the United States and in U.S. Dollars.
  • Gift card must be redeemed at EpicGames.com/redeem. This gift card WILL NOT work if redeemed directly on a console device (PlayStation, Xbox, Nintendo Switch, etc.)
  • If you play Fortnite experiences on a console device, you need to link your Epic Games account to your console account(s) so items purchased at Fortnite.com/item-shop appear across all of your linked accounts
  • Requires internet connection, valid Epic account and prior acceptance of the terms
  • Redemption: Online
Side Objective and win condition Gear described by Epic
Avengers Stop Doom’s forces from collecting all six Arcane Artifacts. Avengers won by depleting the opposing side’s pool of reinforcements. Players received one of four randomly assigned loadouts based on different Avengers. Epic named Iron Man’s Combat Kit and the unvaulted Stark Industries Energy Rifle among the items.
Doom’s Henchmen Gather fragments of Pandora’s Box, collect the six Arcane Artifacts and empower Doom’s Chosen. Epic listed Doctor Doom’s Arcane Gauntlets and a Mythic Combat Assault Rifle. A Mythic Monarch Pistol became available after the first artifact, and a Mythic Sovereign Shotgun after the second. The side also had Shockwave Grenades with a cooldown.

The artifact requirements matter: the Monarch Pistol and Sovereign Shotgun were conditional unlocks, not weapons available from the start.

What did Epic change about controller aim assist?

Epic said v31.20 introduced “human-like aim assist” for controller players on console, PC and mobile. The company described the system as modeling human reaction time so controller tracking of moving targets would better match unassisted keyboard-and-mouse tracking.

Rank #2
Fortnite eGift Card
  • Redeemable on accounts in the United States and in U.S. Dollars.
  • Gift card must be redeemed at EpicGames.com/redeem. This gift card WILL NOT work if redeemed directly on a console device (PlayStation, Xbox, Nintendo Switch, etc.)
  • If you play Fortnite experiences on a console device, you need to link your Epic Games account to your console account(s) so items purchased at Fortnite.com/item-shop appear across all of your linked accounts
  • Requires internet connection, valid Epic account and prior acceptance of the terms
  • Redemption: Online

Epic said it would monitor the impact and tune the system. Its announcement gives no measured accuracy change, quantified advantage or independent test result, so the published material establishes the announced design and intent—not a demonstrated balance outcome. Epic described its intent this way: “Human-like aim assist allows for more balanced tuning for controller players of all skill levels — we’ll be closely monitoring its impact so that we can tune it just right!”

What changed for Creative and UEFN creators?

These were creator-facing changes in the September 12 ecosystem release, distinct from the September 17 Battle Royale announcement.

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Rank #3
Fortnite Physical Gift Card
  • An Epic Games account is required to redeem an Epic Games Store Card code
  • If playing on a console platform (PlayStation Network, Xbox Live, Nintendo Switch or Mobile) you need to link your Epic Games account to that gaming platform (one time) to redeem your gift card code
  • The 16 digit code on the back of the card WILL NOT work if redeemed directly through your gaming platform (PlayStation Network, Xbox Live, Nintendo Switch, Mobile, etc.)
  • Note: Nintendo devices do not support Fortnite Shared Wallet, so V-Bucks purchased using your account balance will not show up on your Nintendo device. However, if you purchase items in the web Item Shop — or another platform where you play Fortnite — those items will be available in your Locker across all platforms.
  • Redemption: Online
  • Village template: The Village island became available as a template in the UEFN Project Browser.
  • Fall Guys islands: The Control: Side Scroller device was added.
  • Texture validation: Texture validation warnings became errors that must be resolved before a session can launch. Epic said the change was intended to improve compatibility and stability across platforms.
  • Fixes: The release notes include a fix for Chains of Hades being unavailable in the Creative inventory, along with fixes for device and input issues. In Verse, Epic listed a server-crash fix involving rollback of compound assignments to local variables and an API fix for player teleportation affecting pitch.
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Which Iron Man items were announced?

Epic announced the Iron Man Mk 45 Outfit, Energy Collector Back Bling, Mark 45 Energy Blades Pickaxe, Arc Reaction Wrap and Mark 45 Bass for the in-game Shop. The Outfit also had a LEGO Style for LEGO experiences. These are digital Fortnite items and styles; Epic’s announcement does not identify any physical purchase as necessary to play or understand v31.20.

Quick Recap

Bestseller No. 1
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$50.00
Bestseller No. 2
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Redeemable on accounts in the United States and in U.S. Dollars.; Requires internet connection, valid Epic account and prior acceptance of the terms
$25.00
Bestseller No. 3
Fortnite Physical Gift Card
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An Epic Games account is required to redeem an Epic Games Store Card code; Redemption: Online
$30.00
Bestseller No. 4
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Redeemable on accounts in the United States and in U.S. Dollars.; Requires internet connection, valid Epic account and prior acceptance of the terms
$15.00
Bestseller No. 5
Fortnite Physical Gift Card
Fortnite Physical Gift Card
An Epic Games account is required to redeem an Epic Games Store Card code; Redemption: Online
$50.00
Best Value
Fortnite Physical Gift Card
  • An Epic Games account is required to redeem an Epic Games Store Card code
  • If playing on a console platform (PlayStation Network, Xbox Live, Nintendo Switch or Mobile) you need to link your Epic Games account to that gaming platform (one time) to redeem your gift card code
  • The 16 digit code on the back of the card WILL NOT work if redeemed directly through your gaming platform (PlayStation Network, Xbox Live, Nintendo Switch, Mobile, etc.)
  • Note: Nintendo devices do not support Fortnite Shared Wallet, so V-Bucks purchased using your account balance will not show up on your Nintendo device. However, if you purchase items in the web Item Shop — or another platform where you play Fortnite — those items will be available in your Locker across all platforms.
  • Redemption: Online
Rank #4
Fortnite eGift Card
  • Redeemable on accounts in the United States and in U.S. Dollars.
  • Gift card must be redeemed at EpicGames.com/redeem. This gift card WILL NOT work if redeemed directly on a console device (PlayStation, Xbox, Nintendo Switch, etc.)
  • If you play Fortnite experiences on a console device, you need to link your Epic Games account to your console account(s) so items purchased at Fortnite.com/item-shop appear across all of your linked accounts
  • Requires internet connection, valid Epic account and prior acceptance of the terms
  • Redemption: Online

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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