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DOOM 3 Hints
Now how can I get to Marine Command?
1 of 4: After going through the locked door in Manifest Control Entrance, move on through more doors until you get to Sec Ops Processing.
2 of 4: From there, make your way further west through various junctions until you get to the Infirmary.
3 of 4: After raiding locker #017 for goodies (use the nearby PDA to get the combo), head north through the Infirmary Observation Room to get to Marine Command.
4 of 4: NOTE: Be prepared for lots of zombies, including the well-armed Z-sec zombies, along this route.
