Achievement ideas

Zen Master - kill x number of enemies with the tau, at once.

it was a glad0s refresher?
fight the tie shoot a scientist in the tie

Win.

I need that more than you Kill 10 security guards and take their weapons

dammit, posters block, no more ideas…

facepalm

is that meant to happen : jump 50 feet up

Home run!
Kill a headcrab that just jumped at your head with a hit of your crowbar without him damaging you.

Sniper
Kill 5 grunts with your cross bow from 200 feet away or more.

Hard to kill
Receive bullet damage, explosion damage, and be attacked by a alien without healing yourself or dying.

Melee fighter
Kill an enemy with your crowbar while with full ammo in all your weapons.

Not so tough now?
Kill a alien grunt with your crowbar.

Achtung Minen: Make it through the Surface Tension minefield without detonating any mines.

wtfBOOOOOOOOM:
Kill 5 enemies with one grenade.

“He can’t see me if I can’t see him”:
Shoot G Man every time he appears.

I got one idea…
I remember, when i played HL1, there was some nest and when you touch, it desappears and appears some small bugs and i love to squash them .. Later, Gordon Freeman uses those bugs to kill enemys… .. And i was thinking…

Achivement: Kill 2320834702473 (lol xD) Bugs

They’re called snarks.

Owl eyed
Play through the entire game without using your flashlight.

Hawk eyed
Find and shoot every single G-Man you see.

NoDraw
Find the void

oh btw… if u shoot G-man… he wont die ._. xD
oh btw, how can u use signature in here? what i mean is my signature doesnt appear in here :\

That, presumably, why he said SHOOT not KILL in his suggestion. You might want to try a bit harder with your typing else you’re going to get flamed to death.

Frohwned - Don’t insert the Bournes pasturised organic Chesire cheese into the anti-mass spectrometer.

You don’t say…

:hmph:

sry… :s

Practice makes perfect Die on the same level and try again 5 times before completing it
When all else fails Hack…

Cache and Carry - Carry every single weapon in Black Mesa at once.

or how about this:

Impulse 101, the hard way - Collect all Black Mesa weaponry (using “impulse 101” in console doesn’t count, of course)

or here’s one:
Ammo hog acquire all in-game weaponry and somehow have a full inventory of each weapons ammo.

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.