Reach Room 20 in Arcade Mode
Destroy 150 Pursuers
Destroy 150 Crawlers
Destroy 100 enemies while Evil Otto is in the room with you
Acquire all Power-ups once
Do not get hit for 20 Rooms in a row in Arcade Mode
Complete all Achievements
Reach Room 50 in Arcade Mode
Reach Room 30 in Arcade Mode with "Iron Man" enabled
Reach Room 30 in Arcade Mode with "Powerless" enabled
Reach Room 30 in Arcade Mode with "Gravity" enabled
Complete a Mission
Complete all Missions
Destroy 150 Drones
Destroy 150 Turrets