Rescue the POWs twice.

Complete all levels using only your knife and no powerups.

Rescue the POWs in less than 10 minutes.

Beat the Enemy Prison Camp.

Score 200,000 or more playing an Xbox Live co-op match.

Use only your knife to beat the Harbor Level.

Complete the Bridge Level.

Complete Missile Base, defeating less than 18 enemies.

Complete the Missile Base without dying.

Get a score of 50,000 or more.

Reach the mortar without defeating any unarmed soldier in Missile Base.

Complete the Missile Base.