[COLOR=‘DarkOrange’]Sun-tzu invented it!
Shoot 25.000.000 bullets
[COLOR=‘DarkOrange’]And then he perfected it so no man could best him in the ring of honour!
Shoot 50.000.000 bullets
[COLOR=‘DarkOrange’]Sun-tzu invented it!
Shoot 25.000.000 bullets
[COLOR=‘DarkOrange’]And then he perfected it so no man could best him in the ring of honour!
Shoot 50.000.000 bullets
[COLOR=‘DarkOrange’]Good Luck!
Kill a Cockroach
[COLOR=‘DarkOrange’]With my mind.
complete all the puzles ingame.
Achievement name’s idea by this song: https://www.youtube.com/watch?v=ACPz49K0b8g
[COLOR=‘DarkOrange’]Pacifish
Go through the game without killing any icthyosaurs.
[COLOR=‘DarkOrange’]???
Kill an icthyosaur by crashing a helicopter on top of it.
[COLOR=‘DarkOrange’]Boycopter
Ignore every helicopter in the game
I have some Achievement ideas.
Wecome To Black Mesa
(Finish Chatper One)
Unforeseen Consequences
(Finish Chatper Two)
Ready For Day One
(Finish The Hzard Course)
Weapons Experts 101
(Collect All Weapons)
What Zombie 1
Kill 5 Zombies With A Crowbar)
What Zombie 2
(Kill 10 Zombies With A Crowbar)
What’s A Zombie
(Kill All Zombies)
What The Hell Was That
(Kill All Ichthyosaurs)
9 That an’t A Shark
(Kill You First Ichthyorsaur)
The One Free Man
(Finish The Game)
The Three Burnt Tentacles
(Burn The Tentacle Bosses)
Thats all for now but i have more.
[COLOR=‘DarkOrange’]Auditor
Let the first soldier of the game kill a scientist
[COLOR=‘DarkOrange’]Savior
Save the scientist from being killed by the first soldier
[COLOR=‘Black’]Madness combat reference lololol
[COLOR=‘DarkRed’]…or swim high.
Kill a helicopter with an icthyosaur.
[COLOR=‘Black’]I know, i know, that bug is most likely fixed, i’m kiddin’.
Yup.
What a cool and totally not ridiculous idea. 
[COLOR=‘DarkOrange’]Scout
Run 25.000 m with sprint.
[COLOR=‘darkorange’]Soldier
Kill 20 enemies with the RPG
[COLOR=‘darkorange’]Pyro
Kill 20 enemies with the gauss gun
[COLOR=‘darkorange’]Demoman
Kill 20 enemies with tripmines and satchels
[COLOR=‘darkorange’]Heavy
Get all the weapons in game
[COLOR=‘darkorange’]Engineer
Destroy 5 sentries
[COLOR=‘darkorange’]Medic
Get the gluon gun.
[COLOR=‘darkorange’]Sniper
Do 20 headshots
[COLOR=‘darkorange’]Spy
Kill an enemy from behind.
The 9 tf2 classes, the 9 achievements wich relate something to them.
HAAAAAXXXX!!! : Use cheat example : noclip , notarget , impulse 101 , etcetera.
Achievements are disabled when sv_cheats is set to 1.
Yeah. But it actually doesn’t stop you from getting achievements, because you can enter “sv_cheats 1”, then “impulse 101”, and then “sv_cheats 0” to de-activate cheats.
I may be wrong, but I think I recall doing that and getting achievements still.
-Microwawe Casserole-
Succesfully acquire the casserole in the beggining of the game.
the trick was typing this: sv_cheats1;Impulse101;god;notarget;sv_cheats 0
Good idea. 
That’s no fun. 
Save the Headcrabs: Do not kill any headcrabs.
[COLOR=‘DarkOrange’]You divided by zero didn’t you!?:Cause a resonance cascade by dividing by zero
[COLOR=‘darkorange’]I will submit to the computer overlord:DO exactly as I say. Exit Black Mesa. Shut down your computer. Go outside. Make a daisy chain. Hang yourself with it…then play through Surface Tension
Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.