Steam

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Install Old Game Version

All games on steam are versioned and stored in a repository - this provides a mechanism to install an old version for a game.

Find your game on the Steam DB.
Locate the manifests for all versions of a game by navigating to a specific game version manifest:

Game ➔ APPID ➔ Packages ➔ SUBID ➔ Depots ➔ Depot ID ➔ Manifests

Example manifest list.
Determine the MANIFESTID to use.

Example manifest.
Open the Steam console from browser: steam://nav/console. Steam Client Boot strapper should launch.
Download old version:
```
# download_depot <AppID> <DepotID> <ManifestID>
download_depot 239140 335819 23871677621866113
```
- AppID is found on the main game listing.
- DepotID & ManifestID found on the manifest listing.
- On completion the location of the download will be shown.
- Downloaded to Steam\steamapps\content\app_{APPID}\depot_{DEPOTID}
Copy the original game files that will be overwritten to another location or back them up.
Copy the old version files into the game directory.
Disable the Internet connection before starting the game. Steam will typically force-update on launch. After launching the Internet connection can be restored.