Download Hints

Get quick and convenient access to just the hints you need for DOOM 3, without staying on our website. Just download a free trial version of our UHS Reader software and a copy of these hints. You will get the same gradual hints you see here -- unlike ordinary cheats or a walkthrough that can spoil your game.

You can also buy the full version of the UHS Reader for Windows or macOS. For just $14.95, you get full access to hints for hundreds of games and 1 year of free updates. You can also search, decode, or print an entire game's worth of hints at once.

Ask the Author

If you have questions about a puzzle that aren't answered anywhere in these hints, you may contact the author.

DOOM 3 Hints

There are more flame-shooting broken pipes in the EP Aerobic Stabilizer area.

  • 1 of 10: And one of them is keeping you from some loot. You're going to have to do something about that.
  • 2 of 10: Go through the only other door in the immediate area and onwards to reach the upper level of Energy Processing.
  • 3 of 10: Go along its catwalk until you find three terminals on its left side.
  • 4 of 10: One of them will allow you to enter a 3-digit code.
  • 5 of 10: You need to enter the correct code to shut off fires in the valves.
  • 6 of 10: Remember how such codes are normally come by.
  • 7 of 10: Check your PDA files. You couldn't have gotten this far without picking up the PDA that contains the code.
  • 8 of 10: Frank Delahue had an audio log that details the procedure for shutting off fires in the valves. Listen to that log to get the code.
  • 9 of 10: It's 842, so enter that into the code console.
  • 10 of 10: Now you can go back the way you came and pick up those goodies that were just beyond the flame.