Before you begin
This overhaul is a BepInEx 5 plugin: a single managed .dll that the BepInEx loader
injects into Two Point Hospital at launch. The whole job takes a few minutes and touches nothing
Steam can't repair. Run through this short checklist first so the rest of the guide goes cleanly.
01 What you need
Four things, all of which you very likely already have:
Two Point Hospital
Any reasonably current build, base game alone or with any combination of DLC. The mod reads the game's own balance tables, so it adapts to whatever content you own. Steam, Epic, or Game Pass (PC) installs all work — anywhere you can reach the folder that holds the game's executable.
Windows 10 or 11 (x64)
Two Point Hospital ships as a 64-bit Unity Mono title, so you need the x64 build of BepInEx 5 — not x86, not IL2CPP. The next page links the exact file. Linux/Proton and Steam Deck also work with the matching Unix build, but this guide shows the Windows path.
BepInEx 5 (x64)
The free, open-source plugin framework that actually loads the mod. We install it in the next step — you don't need it yet, just know it's coming from the official releases page.
The Overhaul archive
One .dll plus its README — bundled with this very guide. Grab it from the
download section; you'll place the .dll in
Step 03.
02 The one folder that matters
Every step in this guide revolves around a single location: your game's install folder —
the directory that contains the game executable, TPH.exe. Both BepInEx and the
mod live inside it. The fastest way to open it on Steam:
Open Steam and find the game
In your Library, right-click Two Point Hospital and choose Manage → Browse local files. Steam opens the install folder directly in File Explorer.
Confirm you're in the right place
You're in the correct folder if you can see TPH.exe alongside files
like UnityPlayer.dll and a *_Data folder. That's the spot.
The full path looks something like the line below. Yours will differ by drive and library name — only the tail end matters.
Depending on your install, that last folder may read Two Point Hospital or a short
form like TPH. Don't go by the name — go by the contents. If
TPH.exe is sitting there, you're home. The reference screenshots later
in this guide were taken in a library where the folder is named TPH.
03 Is anything here risky?
No. This is one of the gentlest mods you can run, and it's fully reversible at three different levels:
In-game switch
Flip MasterEnabled off in the F6 window and the
simulation is 100% vanilla instantly — no restart.
Delete one file
Remove StixsworldHD.UngodlyAI.TPH.dll from BepInEx/plugins and the mod is gone.
The game runs exactly as before.
Verify integrity
Worst case, Steam's Verify integrity of game files restores every original file untouched by either BepInEx or the mod.
This is a single-player simulation mod. There's no multiplayer to break, but as with any mod, it's smart to keep a separate save while you try it. Game updates can also reset BepInEx — if a patch ever makes the mod stop loading, just re-run the install. The Troubleshooting page covers that.
04 Ready?
That's the whole pre-flight. If you can open your game folder and see
TPH.exe, you have everything you need. Next we install the BepInEx 5
loader — the only slightly fiddly part, and even that is just "unzip into a folder and launch once."