We strongly recommend that you buy the game so you can support the developershttps://store.steampowered.com/app/208200/Doom_3_BFG_Edition/
WHAT IS DOOM 3: BFG EDITION
DOOM 3 BFG Edition is the ultimate collection of games that defined the first person shooter including DOOM, DOOM II, DOOM 3, and DOOM 3: Resurrection of Evil, and The Lost Mission.
HOW DO I INSTALL DOOM 3: BFG EDITION?
1. Click the green UploadHub button and you should be redirected to the Download.
2. Once DOOM 3: BFG EDITION is finished downloading, extract the .rar file. (You will need WinRar, you can get it here
3. Once its extracted, go into the games folder and right click the game and run it as administrator and Enjoy!