All cheats for this game by platform:
PC
Primary Collection of Cheats
Unlock the Secret Phrase Achievement
Type "rusty bullet hole" in the chat box.
Hints
Achievements (Steam)
Addict - You have wasted a year of your life playing GMod!
Bad Coder - Experience 500 Lua programming errors.
Bad Friend - Kill 1,000 friendly NPCs.
Ball Eater - Eat 200 balls.
Creator - Spawn 5,000 prop.
Destroyer - Remove 5,000 things.
Dollhouse - Spawn 2,000 ragdolls.
Friendly - Play with 10 friends.
Half Marathon - Play on the same server & map for 4 hours.
Innocent Bystander - Kill 1,000 innocent animals.
Map Loader - Play 20 different maps.
Marathon - Play on the same server & map for 8 hours.
Menu User - Open the spawnmenu 100,000 times.
One Day - 24 hours of your life wasted.
One Month - One whole month of your life wasted.
One Week - One whole week of your life wasted.
Play Around - Play a gamemode that isn't sandbox.
Play Multiplayer - Play multiplayer at least once.
Play Singleplayer - Play singleplayer at least once.
Popper - Burst 1,000 balloons.
Procreator - Spawn 1,000 NPCs.
Secret Phrase - Say the secret phrase.
Startup Millenium - Start Garry's Mod 1,000 times.
War Zone - Killed 1,000 Baddies.
Yes, I am the real garry! - Play on the same server as garry.