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

What do I do when I return from the underground?

  • 1 of 3: Basically, the same thing you did when you first started the game.
  • 2 of 3: Report to Sergeant Kelly in Marine HQ up in the NW part of the area.
  • 3 of 3: The main difference is that this area is now as trashed and hell-infested as the underground was after you found the missing scientist, so you'll have to deal with monsters and find alternate routes around wreckage before you can reach Marine HQ.