A: Verifying files does not touch saves. However, mods that modify core game DLLs may need reinstallation. Back up your Data folder if heavily modded.

A: Not recommended. Each game uses a specific Steam API version. Using the wrong one can cause crashes or “Steam is not running” errors.

This is the most common unofficial cause. Some users who seek out modified .exe files (bypassing Steam) often overwrite or remove the original DLL. , this should never happen. If you obtained the game unofficially, you will need to revert to the original files.