Doom 3 gameplay walkthrough. I open all of the safes and get a decent amount of the hidden items. This video includes levels: Mars City, Mars City Underground, Mars City 2, and Administration. I'm using the Doom 3 Absolute HD Mod which includes a number of graphics and gameplay tweaks. This is not the BFG Edition. Do not get the BFG Edition.
CPU: AMD Phenom II x4 965 OC'd @ 4.0Ghz GPU: MSI GTX 770 Lightning OC'd