Real game files are executables (.exe) or archives (.rar, .zip, .iso). Never open a file ending in .lnk or .bat .

To help me give you the best advice for your setup, tell me: Are you dealing with , or is low disk space your main issue? Also, what are your PC specifications ? Share public link

If a repack claims to be under 500MB for Dark Souls 1, it is a scam. Basic game assets (textures, audio, maps) cannot be compressed that small without total corruption.