Doom 3: Lost Mission - Hell Outpost (Level 8)
Welcome to a walkthrough of Doom 3: Lost Mission. This is the second expansion to Doom 3 and takes place 6 hours after the Mars invasion has started. One last survivor is asked to destroy the experimental teleportation array deep inside Hell. Only you can assemble the components needed to activate the array, then teleport to Mars in order to destroy it.
Walkthrough: https://gamerwalkthroughs.com/doom-3/