Doom 3: BFG Edition Save Game Location

Windows

Doom 3: BFG Edition save games can be found on Windows here:

C:\Users\[user_name]\Saved Games\id Software\DOOM 3 BFG\base\

Linux

Doom 3: BFG Edition save games can be found on Linux (Proton) here:

~/.steam/steam/userdata/[user_id]/208200