777
Not unlocked yetWin Fuel on the first try
Uber Tuber
Not unlocked yetExpensive but delicious! Brought to you by Dr. Dougley and Lord Ned.
Science Got Done
Not unlocked yetWin a Long Game on Aperture on Normal Difficulty.
Still Alive
Not unlocked yetWin a Long Game on Aperture on Hard Difficulty.
This is a Triumph
Not unlocked yetWin a Long Game on Aperture on Suicidal Difficulty.
I'm Making a Note Here, Huge Success
Not unlocked yetWin a Long Game on Aperture on Hell on Earth Difficulty.
Golden Potato
Not unlocked yetGet into GLaDOS' core on Aperture.
I Like To Watch
Not unlocked yetAquire 5 Minutes of "Zed-Time".
One Giant Leap (Back) for Mankind
Not unlocked yetBeat Moonbase on Hell on Earth Difficulty
Full Charge
Not unlocked yetHave 5 Breaker Boxes 100% repaired at the same time
Amusing Death
Not unlocked yetBeat Moonbase on Suicidal Difficulty
Attempting Re-entry
Not unlocked yetBeat Moonbase on Hard Difficulty
Under The Weather
Not unlocked yetUse Bile or the Flamethrower to kill one of each Halloween Zed
Blinding Big Brother
Not unlocked yetDestroy all 30 Cameras
But It's All Red!
Not unlocked yetCollect all 16 Z.E.D. Gun pieces
Eggnog Anyone?
Not unlocked yet[2010 Xmas] Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.
Claw Machine Master
Not unlocked yetAttach the crane hook within 125 seconds
All shook up
Not unlocked yetDestroy all (15) Snow Globes
Grim Reaper
Not unlocked yetGet the 6 Special Halloween Achievements plus 1 Hillbilly Horror Map Achievement to unlock the Grim Reaper
Arcade Gamer
Not unlocked yet[2013 Summer] Complete the Pop the Clot, the Strong Man and the Grenade Toss games
Doctor WHO??
Not unlocked yetTransit - Get all Objective achievements AND beat KFO Transit on Hard or above to unlock Dr Rachel Clamely.
Pound Cake
Not unlocked yetComplete all new map achievements on Hard Difficulty.
Devil Cake
Not unlocked yetComplete all new map achievements on Hell On Earth Difficulty.
Piece of Cake
Not unlocked yetComplete all new map achievements on Normal Difficulty.