Here are some .
Just for fun.
The Incident- Destroy Magnusson’s casserole
Way to Go Fuckhead- Unleash a Resonance Cascade and doom mankind
This is My Boomstick- Kill 25 zombies with the shotgun
Wrong Valve Game- Teabag an enemy corpse
What the Hell is this Damn Thing?- Get killed by the spinny blade thing in the operating room.
Blue Screen of Death- Screw with the Front Desk Guard’s computer
Catwalks Suck- Return to the tram station and kill a scientist
PHD in Kicking Your Ass- Kill total 2000 enemies (multiple playthroughs allowed)
MIT Education Pays Off- Press 20 buttons
Smile You Son of a…-Blow up an Icthyosaur
Physicists Need Their Caffeine- Grab a Soda
Don’t Cross The Streams- Find The Gluon Gun
Isn’t it cute? I-Aaaaaarghh!-Get zapped by a Houndeye
All Aliens Are Bastards- Take damage from every Xen creature in the game at least once
One Man’s Trash- Find Your Crowbar in Residue Processing
Clint Eastwood Manly- Defeat 40 enemies with the crowbar
Chuck Norris Manly- Defeat 60 enemies with the Crowbar
Rosie O’Donnel Manly- Defeat 100 enemies with the Crowbar and whack each Gargantua 10 times
Tiptoe Through The Tripwires-Get through the Nuclear Hanger without setting it off once
Hurrk!- Get grabbed by Barnacles 20 times
Now I Know What A T.V. Dinner Feels Like- Crawl around in a shit-ton of vents
Time Paradox!-Kill Eli and Kleiner
Fucking Epic- Deal the ending blow to Nihilanth with the Crowbar
Whaddaya think?