Reach 2 000 points without missing a single shot.

Kill the enemy without doing damage to it.

Kill 10 enemies with a single shot from a railgun.

Detonate 50 bombs with a single shot.

Kill 1000 centipedes.

Kill 400 scorpions.

Kill 600 fleas.

Kill 800 spiders.

Reach 20 000 points in arcade mode.

Reach 30 000 points in arcade mode.

Reach 40 000 points in arcade mode.

Complete all challenges in a single player mode.

Complete all challenges in coop mode.

Survive 3 minutes.

Resurrect an ally in coop mode.

Kill 15 enemies in rapid succession.