Fruitcake
Beat 10 advanced chambers
25 ✓ August 22nd, 2010
Like a Rat
Trap yourself in a test chamber so that GLaDOS has to help you continue.
20 ✓ August 19th, 2010
Go for the Gold
Win a gold medal on a challenge map.
15 ✓ October 10th, 2010
Rat's Tale
Find all the Rat Man dens.
15 ✓ December 20th, 2010
Tests Like Chicken
Find the chicken's test results.
15 ✓ September 25th, 2010
Cupcake
Beat 5 advanced chambers
10 ✓ August 22nd, 2010
The Camera Adds 10 Pounds
Knock a turret over with a security camera.
10 ✓ August 19th, 2010
Saw That One Coming
Cause a rocket sentry to destroy its own rocket when the rocket has been redirected back towards it.
5 ✓ August 19th, 2010
A Feeling Like Floating
Dissolve a turret.
5 ✓ August 19th, 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