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DOOM 3 Hints
How can I get to the secret plasma gun?
1 of 11: If I told you that, it wouldn't be a secret.
2 of 11: But hey, that's what hint files are for. Read on to find out where this wondrous weapon is hiding.
3 of 11: First, you need to make it to the Boiler Room Monitoring area, which is just past the main Boiler Room.
4 of 11: Find the control panels in the monitoring room (a little ways to the right of the door) and click on the button that opens ventilation access grate 3.
5 of 11: Return to the Boiler Room and head left to find the open vent just above a large crate.
6 of 11: Jump onto the crate and then crawl into the vent and follow it along.
7 of 11: When you come to two closed grates, push against them to see which one will fall off.
8 of 11: Crawl through it onto several large gray pipes.
9 of 11: If you follow them to the end, you'll find a nice stash of armor shards, but no plasma gun!
10 of 11: Go back the way you came until you can jump onto the large red pipe.
11 of 11: From there, jump over to the two blue pipes and crawl up to the top of them to find the plasma gun. What fun!