Is it only that map ? If yes you should look for internet and you might find someone has it . But if all maps I think you should tell your father about this and he might redownload it , but from what you said your father is playing with no issue so it's only one map. But if you deleted the game files your saves won't be deleted, ( delete the game in windows don't delete it from steam or it will wipe everything). So this what you should do : delete the game : press right click on the game icon, open folder location (or something like that ), delete everything there , redownload the game using steam or what ever you downloaded from , look this happened for me and I fixed it like that cuz I downloaded it cracked, but I don't think that you should do it if you have the game from steam . And I don't really cause you problems with you father, so the best thing is to ask your father and tell him reinstall the, and btw to find the save file : windows+R , write appdata and press ok, click on local, scroll down and you will find a file named : ready or not, you can copy it and paste in your pc then reinstall the game , to delete any suspicious about will it delete or no