Cannonball enemies 50 times

Complete 50 Classic levels

Earn the right to take on three-star assignments.

An apple for a head

Put a soda can in the wrong place instead of recycling

Pull enough fire alarms

Find the nook in Optical

Escape the Jagras pack by hiding in some shrubs.

Find Area 52

Recruit Grace's group

Stop the Nazi signal from Section F

Use the power armor

Make the choice