Kill 50 mutants.
Kill 100 mutants.
Kill 200 mutants.
Unlock a Special Power.
Kill 400 mutants.
Unlock three Special Powers.
Unlock five Special Powers.
Kill two mutants in one shot.
Complete an objective.
Kill three mutants in one shot.
Kill four or more mutants in one shot.
Max upgrade a weapon.
Upgrade your weapon.
Destroy 5 vending machines in a mission.
Destroy 10 vending machines in a mission.
Complete 10 missions.
Complete a mission.
Complete 30 missions.
Complete a shaft.
Complete three shafts.
Complete two shafts.
Score higher than 10000
Score higher than 50000
Earn a level three rating on a floor.
Score higher than 100000
Earn a level three rating on all Medical Research floors.
Earn a level three rating on all Military Branch floors.
Max upgrade all weapons.
Earn a level three rating on all Factory X floors.