Download Hints

Get quick and convenient access to just the hints you need for Half-Life, 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.

Half-Life Hints

Why won't the scientist open the door in Hazardous Materials Bay B?

  • 1 of 4: The scientist will not open the door until he feels safe enough.
  • 2 of 4: With several alien grunts running around, you can't blame him.
  • 3 of 4: Take care of all of the alien grunts, and he will walk over and open the door when you approach it.
  • 4 of 4: Once he's said his piece and opened the other door for you, take a right past the lift to find the room with the gluon gun in it. Glue onta that sucker and the nearby ammo packs because it's gonna come in real handy at the end of this chapter. (Don't use it or the gauss gun much before then so as to conserve ammo for the end.)