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

Explained · Updated 2026-10-07

How AI Game Merging Works

AI game merging looks like magic in a 30-second clip: Steve swinging a diamond sword at an Elden Ring boss, a Call of Duty soldier grinding a rail. Underneath, every one of these projects uses one of a few well-understood techniques, and the AI’s role is narrower, and more interesting, than most viral posts suggest. Here is how AI game merging works, without the jargon.

Games are baked cakes

The simplest way to picture it, borrowed from one of the clearest explainer videos on the trend: when developers make a game, they write code humans can read. That is the recipe. They then compile it into machine code, a wall of numbers only a computer understands. That is the cake. When you buy a game, you get the cake, not the recipe.

To change how a game behaves, someone has to work backwards from the cake to the recipe. That is decompiling or reverse engineering, and for most of gaming history it took dedicated people years per game. Merging two games means doing that for both, then making two recipes that were never designed to fit together work as one.

Why older game mods were mostly cosmetic

People have mixed games for two decades. Garry’s Mod began as a Half-Life 2 mod in 2004 and let you spawn content from other Source games, as long as you owned them. Modders have long added Call of Duty guns to GTA San Andreas and replaced Skyrim’s dragons with Thomas the Tank Engine.

But most of that was assets: models, textures and sounds. A Call of Duty rifle in San Andreas looked like Call of Duty but still fired on GTA’s gun system, because the rules of the game were locked inside the compiled code. Moving how a game feels (its physics, its timing, its moves) required the recipe, and the recipe was the expensive part.

What changed in 2026

Two things arrived at once.

First, years of community reverse-engineering matured. There are now open-source rewrites of Modern Warfare 2 (IW4L) and Skate 3 (the Skate 3 Rust engine), decompilations of Super Mario 64, and established mod loaders for Skyrim, Elden Ring and GTA V.

Second, AI coding agents got good enough to work on top of that groundwork. An agent such as Claude Code can read unfamiliar code, write a change, build it, launch the game, read the crash log and try again, for hours, without getting tired. Creators in the September 2026 wave mostly used Claude Opus 5.5 and describe their projects as almost entirely vibe-coded: they describe what they want, the AI writes the code, and they steer.

The three types of AI game merging

Every project on our AI merge games directory is labelled with one of these methods.

Live bridge (passthrough)

Both real games run at the same time on your PC. One, the guest, runs hidden in the background and supplies the player’s movement and actions. The other, the host, draws everything you see. Small plugins in each game exchange data through shared memory every frame: where the player is, what the camera sees, what got hit.

SkyCraft is the reference example: Minecraft runs hidden with a Fabric mod, Skyrim runs with an SKSE plugin, and Skyrim’s terrain becomes invisible Minecraft blocks so Steve can walk on it. ArkWeb uses the same pattern to put Spider-Man in Gotham, cutting Spider-Man’s rendered frame out and drawing it where Batman would be.

Strengths: you get the genuine guest game: real Minecraft, real Spider-Man physics. Costs: it is heavy on your PC, and it is tied to exact game versions.

Engine transplant

A rebuilt engine from one game runs inside the other. Because the Skate 3 Rust engine is open-source code, modders can load it into another game and wire it to that game’s character and collision. That is how BullySkate, Skate 3 in GTA San Andreas and SkateGM work, and why they all feel like the same Skate 3.

Mario in Elden Ring is another transplant: libsm64, built from the Super Mario 64 decompilation, runs Mario’s movement inside Elden Ring using Elden Ring’s live collision. The MW2 × Skate 3 × Minecraft mashup goes furthest: all three games run as rebuilt code in a single program, so gun damage can directly decide how many bullets a Minecraft block takes.

Strengths: lighter than running two games, and the merge can go deeper. Costs: it only works where someone has already rebuilt the guest game’s engine.

Mechanics port

One game’s rules are re-created inside the other, using the original art and sound from your own install. Warcraft CS re-implements Counter-Strike 1.6 movement, recoil and weapons inside Warcraft III and imports CS models and sounds from your copy. It is the closest to traditional modding, with AI doing the heavy lifting of matching the original behaviour.

What we don’t count: reskins

Swapping one game’s character model into another is easy to fake in a video and doesn’t move any gameplay. Commenters often argue whether a viral clip is “a real merge or just a skin”. If no code is public, we label the method Not confirmed rather than guess.

The glue: making two games fit

Two games are never designed to fit together, so most of the work is translation:

  • Skeletons. A Skate 3 skater and an MW2 soldier have different bone rigs. A mapping layer copies one onto the other so the soldier can kickflip.
  • Coordinates. Games disagree on which way is up and what a metre is. Bridges convert positions every frame.
  • Collision. The host world has to become something the guest’s physics understands, such as invisible Minecraft blocks sampled from Elden Ring’s terrain.
  • Damage and rules. A Minecraft sword hit has to become an Elden Ring hit; an MW2 bullet has to break Minecraft stone.

This is exactly the kind of tedious write-test-fix loop AI agents are good at.

What the AI does, and what humans still do

The AI: reads decompiled code, finds the right hooks, writes and rewrites the glue, builds the project, runs the games, reads logs and screenshots, and optimises performance. Garry’s Redemption, which puts Garry’s Mod inside Red Dead Redemption 2, was built with the model launching and driving both games itself.

Humans: the years of reverse-engineering the AI builds on, choosing what to make, and above all playing it. Creators repeatedly say the AI cannot tell whether something feels right. It bakes the cake; a person still has to taste it.

Why you always need your own games

Mashup mods ship only their own code. They read textures, models, sounds and game logic from copies you own, just as Garry’s Mod did in 2004. That keeps creators on safer legal ground, though not safe ground. Publishers can still demand takedowns, as the fans behind the GTA 3 and Vice City rewrites found in 2021. It also means any download that includes a full commercial game is not legitimate.

Try it