Create your fortress, ready your arsenal, upgrade your defences, and prepare yourself! BIT ROT is a co-op and singleplayer zombie horde survival where every run is different. A new map, loadout, base, and a new way to die! How long can you survive the horde?

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About This Game

Build. Defend. Upgrade. Rot. 

The dead don't sleep. Fortify or die

  • Raise walls, set traps and funnel zombies into kill zones before the horde finds a way through

  • Create your own fortress in three dedicated game modes

  • Build your own custom maps, and even customise character skins and game sounds!

Fight for every wave

  • Struggle for survival against special infected with unique looks and abilities

  • Upgrade your weaponry to utilise elements and abilities

  • Open crates for stackable character traits which last the entire run

An arsenal worth gambling for

  • Forge a brutal spread of weapons, from shotguns to flamethrowers to sniper rifles that never miss

  • Stack elements, mods and perks into a loadout that turns you from prey into predator

  • Look out for rare drops that dramatically increase your chances of survival

Play it your way, with whoever you want

  • Drop in with friends and hold the line together in full co-op

  • Chase Steam achievements and climb the leaderboards against the rest of the world

  • Customize your look, remix the audio, and tune the game to how you actually want to play

  • Flip on Meme Mode if you'd rather the apocalypse be a little bit funnier

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The developer directed AI via natural-language instructions to write, debug, and extend the game's code, reviewing and testing each change. Some player-facing text, like the achievement names, was also drafted with AI help before it was finalised. The visuals and sound aren't made by a separate AI art or audio tool. They come from that same code running while you play: sprites and effects are drawn with basic canvas commands, and all the sound is synthesised live using standard oscillators, filters and noise, not AI generated image or audio files. Nothing in the game runs generative AI while you're playing it. No AI dialogue, no content being generated live, and no player data is collected or used to train any model.

Mature Content Description

The developers describe the content like this:

As with any zombie games, this title contains gore, shooting and death. However, blood is toggleable, and there are no graphic human or non-human deaths.

System Requirements

    Minimum:
    • OS: Windows 10 64-bit or later
    • Processor: Intel Core i3 (or AMD equivalent), dual-core 2.0 GHz+
    • Memory: 4 GB RAM
    • Graphics: Intel HD Graphics 4000 or newer (or equivalent)
    • DirectX: Version 10
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
    • Sound Card: Onboard/DirectX-compatible audio
    • VR Support: N/A
    Recommended:
    • OS: Windows 10/11 64-bit
    • Processor: Intel Core i5 6th gen+ (or AMD equivalent), quad-core 2.5 GHz+
    • Memory: 8 GB RAM
    • Graphics: Intel UHD 620 or newer (or equivalent)
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    • Sound Card: Onboard/DirectX-compatible audio
    • VR Support: N/A