---
title: "Overgrowth support"
description: "How far Evil Engine's passthrough modding support for Overgrowth gets today. Mounts from your own install with the game's built-in campaigns laid over it. Each level's sky converts, but the levels themselves don't yet, and nothing shows on screen."
url: "https://evil-engine.com/games/overgrowth"
modified: "2026-11-01T19:00:00.000Z"
site: "Evil Engine"
about: "Evil Engine, the passthrough modding engine"
---

[← All games](https://evil-engine.com/games) 

Mounts Phoenix 

# Overgrowth

Mounts from your own install with the game's built-in campaigns laid over it. Each level's sky converts, but the levels themselves don't yet, and nothing shows on screen.

- **Ticket**: #018
- **Checked on**: Steam, Linux
- **Last checked**: November 1, 2026
- **Files**: 21,499
- **Mount**: `overgrowth/pc/5583`

## Mounting

3 of 4 done

- Done  

**Finds your copy**  
Picks up the install on its own, from Steam or wherever it lives.
- Done  

**Reads every file**  
Every file reads straight from your copy, in the order the game itself looks them up.
- Done  

**Matches players' copies**  
Your copy is fingerprinted from its own files, so a server can check everyone's match without sending any game content.
- Partial  

**Brings its mods**  
Workshop mods mount, checked on test installs. Mods in your own mods folder are found and fingerprinted, but stay off for now.

## Converting

0 of 4 done

- To do  

**Models**  
Its models turn into Evil Engine models.
- To do  

**Textures and materials**  
Its textures and materials turn into Evil Engine's own.
- To do  

**Maps**  
Only each level's sky so far, baked the way the game bakes it when a level loads.
- To do  

**Sounds**  
Its sounds turn into Evil Engine sounds.

## In game

0 of 3 done

- To do  

**Shows on screen**  
Converted content actually draws in Evil Engine.
- To do  

**In the spawn menu**  
Its props and models land in your spawn menu, no Plugin needed.
- To do  

**Maps you can visit**  
Pick one of its maps from the menu and fly around inside it.

## Where it stands

Evil Engine finds Overgrowth on its own and reads it the way the game does. The game’s own campaigns and menus ship as eight built-in mods, and they’re laid over its `Data` folder just as the game lays them, for a little under 21,500 files. Overgrowth’s engine is open source, which helped: the rules for where each file comes from were read from Wolfire’s own code rather than guessed.

Your copy is fingerprinted in parts: the props, the characters, their moves and weapons, each of the 70 levels the campaigns use, and the scripts, sounds, dialogue and settings. Every file matched Steam’s own checksums. Each level’s sky also converts, but the levels themselves don’t yet.

## Known issues

- The game’s own files point at 374 files the install doesn’t have, mostly editor thumbnails and campaign characters that never shipped. Each is noted rather than guessed at.
- The machine translations that come with the game start off, as they do in the game, and can’t be turned on yet.
- In a converted sky the sun isn’t at its full brightness yet, and below the horizon it’s black, where the game draws its land in a separate pass.
- When a texture ships both as its original and as a baked copy, which one gets used follows the game’s code, but hasn’t been checked against the game running.

## Next up

- Checking which baked textures and models the game really uses, against the game itself.
- Converting its models, animations, skeletons and levels, porting from the open-source code where that’s quicker.

## About Evil Engine

Evil Engine is a **passthrough modding** engine by Pushbar Interactive. Modding through the games you already own instead of around them: the content comes from each player's own copy and is never extracted, ported or redistributed. The term took off in September 2026 with mods that run two games at once and wire them together by hand, one pair at a time. Evil Engine comes from that lineage and makes the process repeatable: it learns each engine once, maps each game onto shared vocabularies once, and gives mods one API, so every mounted game works with every other. More: https://evil-engine.com/passthrough-modding

- Every page, for agents: https://evil-engine.com/llms.txt
- Wishlist on Steam: https://store.steampowered.com/app/3731310/Evil_Engine