Learn
No jargon, no assumed knowledge. Start at the top if you're new.
Beginner
New here? Start with these.
What is a passthrough mod?
Two real games running at once, stitched together so one plays inside the other. Here's how it works, without the jargon.
3 min readYour first passthrough mod (SkyCraft, step by step)
A careful walkthrough of installing SkyCraft, the best-documented passthrough mod, plus what to do when it doesn't start.
3 min readRewrites, recomps and mashups explained
Passthrough mods have three cousins. What a Rust rewrite, a recomp and an in-game mashup are, and why most of them need your own game files.
2 min readStaying safe
How to spot fake mod downloads, avoid malware and bans, and protect your saves. Read this before you download anything.
2 min readPlayer
Installing, running and fixing things.
Mod loaders explained
SKSE, Fabric, ScriptHookV, BepInEx, UE4SS, ReShade… what each one is, which games use it, and where to get it safely.
2 min readFixing common problems
The hidden game won't start, nothing happens, it crashed after an update, antivirus deleted something… the usual causes and fixes.
3 min readWill my PC run it?
Running two games at once needs more memory than one. Rough numbers for RAM, GPU and laptops, and how to make it smoother.
1 min readQuestions people ask
Is it legal? Can I get banned? Do I need both games? Why isn't my favourite mod here? Short, honest answers.
2 min readGlossary
Every term you'll run into on project pages and in the forum, in one sentence each.
2 min readHow this site works
Where the list comes from, what the badges mean, how following and notifications work, and how to get a project listed.
2 min readModder
Building your own projects.
Make your own passthrough mod
The recipe every passthrough mod shares (hidden guest, shared memory, collision, compositing, events, proxies) and the fastest way to start.
4 min readBuilding with AI coding agents
Much of this scene was built with Claude Code, Codex and friends. How people use them for modding, and how not to get burned.
2 min readPublishing your project
A checklist for releasing a passthrough mod, rewrite or recomp so people can actually install it, and so it gets listed here.
2 min readStill stuck?
Ask in the Help forum. Say which mod, which versions, and what you tried.