FAQ

Are AI merge games real or fake?

Many are real. The MW2, Skate 3 and Minecraft mashup, SkyCraft and Mario in Elden Ring all have public code and downloads on GitHub. Some viral clips, including the original Minecraft in Elden Ring video, have never been released. Every entry on this site is labelled Playable, Build it yourself or Video only.

Do I need to own both games?

Almost always, yes. Legitimate mashup mods never include game files. They read the files from your own installed copies, the same way Garry’s Mod needed other Source games back in 2004. Each mashup page lists exactly which games, versions and platforms you need.

Is it safe to download AI game mashups?

Only from the creator’s own repository. Fake look-alike repositories appeared within days of the trend. We link the official page for every project and never re-upload anything. Back up your saves before installing, and never run an unsigned .exe from an account created the same week.

Can I get banned for playing these mods?

Not if you stay offline. Most mashups only run with anti-cheat switched off, and the creators are explicit that they must never be taken online. Games such as Elden Ring and GTA V can ban accounts that join online play with modified files.

Do AI merge games work on Mac?

Most are Windows only, because the host games are Windows PC games. The Minecraft Crossover Bridge is the exception: it runs Minecraft inside Elden Ring or Monster Hunter World on Apple Silicon Macs through CrossOver. Use the finder and pick Mac.

Can I merge two games myself with AI?

Yes, if you are patient. Tools like Claude Code with the open-source universal-modder toolkit can identify a game’s engine, decompile it and build a mod. You still need to own the games and to judge what feels right. The AI cannot. Read the step-by-step guide.

Are AI game mashups legal?

It is a grey area. Reverse engineering for compatibility is allowed in some places, but distributing a publisher’s files or characters is not, and publishers can demand takedowns. Fans who rebuilt GTA 3 and Vice City were hit with a DMCA takedown in 2021. That is why every project here asks you to bring your own games.

I made a mashup. Can you list it?

Yes. Send us the official repository or video link. We read the README, check what you need to own, and add it with the right status label. We never list projects that bundle game files.Email us

Playable · Live bridge

Ultracraft

The real ULTRAKILL running inside real Minecraft: become V1, fight its bosses in your own world.

Official download

★ 51 · updated Oct 6, 2026 · v1.0.4

Links to the creator's own GitHub page, checked Oct 7, 2026. We never host or re-upload files, and no game files are included. Re-uploads and look-alike repos can carry malware.

Most mashups put Minecraft inside another game. Ultracraft goes the other way: your Minecraft world becomes ULTRAKILL’s battlefield. You play as V1, ULTRAKILL’s enemies spawn in the dark, and arenas themed after its layers generate as you explore.

What you get

  • V1 in Minecraft. ULTRAKILL’s movement, weapons and style system, with F8 to switch back to Steve.
  • Enemies by biome. Husks on the plains, Greed’s soldiers in deserts, Gluttony’s flesh in swamps, Violence’s machines in jungles and deep caves. The Nether gets demons; the End gets angels.
  • Bosses, the shop and the Cyber Grind, plus ULTRAKILL’s fight music and its Sandbox cheats.
  • LAN co-op through Minecraft’s own world sharing.

ULTRAKILL’s enemies also fight Minecraft’s hostile mobs, and anything that would launch V1 launches a mob just as far.

How it works

Both real games run at once. Minecraft is the world you see; ULTRAKILL runs alongside it and is drawn into Minecraft’s window, with a small plugin passing everything between them. That makes it a live bridge, built in the same family as SkyCraft.

What you need

  • ULTRAKILL on Steam, with Steam running.
  • Minecraft: Java Edition.
  • Windows.

Install in short

The easiest route is the ready-made modpack from the official releases: import Ultracraft.mrpack into the Modrinth App, or the CurseForge zip into the CurseForge App. Start that instance and Ultracraft finds ULTRAKILL through Steam, installs BepInEx 5 and its bridge plugin into it, and starts it for you. Open a world and you are V1.

If it gets stuck

If Minecraft sits on “ULTRAKILL connected, loading V1”, update to the latest release. Older versions waited forever on an ULTRAKILL save that hadn’t finished the tutorial. A crash mentioning “class file major version 65” means your Fabric Loader is too old for 1.21.11.

Related: Killcraft does the opposite, putting Minecraft inside ULTRAKILL’s levels.

Same games, different merge

More cartridges