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