Finish a normal level without using abilities, weapons or melee.

Finish a normal level in under 20 seconds.

Finish a normal level without being seen.

Play 20 levels without dying.

Defeat the spiderbot.

Defeat the centipede.

Defeat the hovertank.

Kill 1000 enemies.

Kill 8 enemies with a single explosion.

Kill 3 enemies with a single railgun bullet.

Stop the Overseer 1.0.

Complete all special levels.

Upgrade a stat to level 100.

Unlock all unlockables.