Fruitcake
Beat 10 advanced chambers
25 ✓ March 26th, 2010
Like a Rat
Trap yourself in a test chamber so that GLaDOS has to help you continue.
20 ✓ March 25th, 2010
Go for the Gold
Win a gold medal on a challenge map.
15 ✓ August 6th, 2010
Tests Like Chicken
Find the chicken's test results.
15 ✓ June 25th, 2011
Cupcake
Beat 5 advanced chambers
10 ✓ March 24th, 2010
The Camera Adds 10 Pounds
Knock a turret over with a security camera.
10 ✓ October 7th, 2011
A Feeling Like Floating
Dissolve a turret.
5 ✓ March 23rd, 2010
Vanilla Crazy Cake
Beat all advanced chambers
35 
Out of the Blue
Once you have control of both portals, only enter the orange portal.
25 
Is Anyone There?
Complete the game without ever taking a bullet.
20 
Rat's Tale
Find all the Rat Man dens.
15 
Saw That One Coming
Cause a rocket sentry to destroy its own rocket when the rocket has been redirected back towards it.
5