Is Anyone There?
Complete the game without ever taking a bullet.
20 ✓ May 20th, 2010
Like a Rat
Trap yourself in a test chamber so that GLaDOS has to help you continue.
20 ✓ May 20th, 2010
Go for the Gold
Win a gold medal on a challenge map.
15 ✓ May 20th, 2010
Tests Like Chicken
Find the chicken's test results.
15 ✓ May 20th, 2010
The Camera Adds 10 Pounds
Knock a turret over with a security camera.
10 ✓ May 20th, 2010
Saw That One Coming
Cause a rocket sentry to destroy its own rocket when the rocket has been redirected back towards it.
5 ✓ May 20th, 2010
A Feeling Like Floating
Dissolve a turret.
5 ✓ May 20th, 2010
Vanilla Crazy Cake
Beat all advanced chambers
35 
Fruitcake
Beat 10 advanced chambers
25 
Out of the Blue
Once you have control of both portals, only enter the orange portal.
25 
Rat's Tale
Find all the Rat Man dens.
15 
Cupcake
Beat 5 advanced chambers
10