Please help me.

[Paddy™]

From where did you buy the game? If it's from Steam, you might just need to run the "Verify Game Cache" tool, rather than download/install the entire game again. You can find instructions for this procedure here:

https://support.steampowered.com/kb_arti...-QEUH-3335

If that doesn't work (i.e. if it doesn't replace the modified files with the originals), simply delete the game files by right-clicking the shortcut in Steam's launcher and selecting "Delete Local Content...", like so:



When this is done, install the game again like you did the first time. You can do this by right-clicking the game's name again and selecting "Install Game..." from the menu.

If you bought the game from the Frictional Store, The Humble Store, GOG or on disc you can simply run the installer again like you did when you first installed the game. This will overwrite the game files with the original versions.

If you need any more help don't hesitate to post again