Mods are one of the best things about PC gaming, and most of the time they just work. When they don't, the damage usually comes in two forms: a game that won't start, or a save that's broken. Both are easy to recover from if you prepare before you install anything, and painful if you don't.
Here's a simple routine that makes modding reversible. None of it needs special tools.
Before you install anything
1. Copy your save files somewhere safe. Find where your game keeps its saves and copy that folder to another drive or a USB stick. The location varies from game to game, so check the game's own support pages or settings. *Expected result:* if a mod corrupts your progress, you can put the original files back.
PC Gamer's guide to repairing Steam installs makes the same recommendation before attempting a fix: back up your saves "through the Steam Cloud or onto a flash drive".
2. Don't rely only on cloud sync. Cloud saves are great for moving between devices, but they sync whatever's newest. If a mod damages a save and the game uploads it, the cloud copy can be the broken one too. A manual copy you made yourself is the backup that can't be overwritten. *Expected result:* one clean copy that sits outside any automatic sync.
3. Check the mod matches your game version. Games update, and mods made for an older version can break after a patch. Read the mod's description for the version it supports before installing. *Expected result:* fewer crashes after updates.
While you're modding
4. Add one mod at a time. Install a mod, launch the game, and check it works before adding the next. It's slower, but when something breaks, you'll know exactly which mod did it. *Expected result:* problems you can trace and undo in minutes rather than hours.
5. Prefer official mod support where a game offers it. More games now build mod support in. Cyberpunk 2077's free update 2.5, for example, adds cross-platform mod support through mod.io with an in-game Mods panel, according to CD Projekt's post on Xbox Wire. In our view, built-in systems are easier to manage and switch off than files dropped into a game folder by hand. The same update also adds separate save libraries for each V, which is a handy way to keep a modded character apart from your main run.
6. Keep mods away from online competitive games. Competitive and anti-cheat-protected games can treat modified files as cheating. Stick to single-player games, or to what a game's developer officially supports.
When something breaks
7. Remove the mod first, then repair the game. Uninstall the mod with whatever you used to install it, or delete the files you added. Then use the launcher's built-in repair. On Steam, that's the feature Steam Support calls Verify Integrity of Game Files. PC Gamer explains what it does: Steam checks your install, and "if it finds anything wrong with it those files will be re-downloaded and installed." That guide is several years old, so the menu labels in today's Steam client may differ slightly from the ones it shows. Look for the verify option in the game's properties.
*Expected result:* the game's original files are restored. Verification is designed to fix damaged or missing game files, so remove mods first rather than expecting it to clean up everything a mod added.
8. Restore your save. If your progress is damaged, copy back the save folder from step 1.
The pattern is the same every time: back up, change one thing, test, and know your way back. Do that and a bad mod costs you ten minutes, not your save file.
Reporting notes