The Queen
Not unlocked yetKill the Queen on medium difficulty without having any crutches enabled
The Knight
Not unlocked yetKill the Knight on medium difficulty without having any crutches enabled
The Lich
Not unlocked yetKill the Lich on medium difficulty without having any crutches enabled
The Dragon
Not unlocked yetKill the Dragon on medium difficulty without having any crutches enabled
The Hard Queen
Not unlocked yetKill the Queen on hard difficulty without having any crutches enabled
The Hard Knight
Not unlocked yetKill the Knight on hard difficulty without having any crutches enabled
The Hard Lich
Not unlocked yetKill the Lich on hard difficulty without having any crutches enabled
The Hard Dragon
Not unlocked yetKill the Dragon on hard difficulty without having any crutches enabled
Harvesting
Not unlocked yetFind the first easter egg
The Heist
Not unlocked yetFind the second easter egg
Earth & Void
Not unlocked yetFind the third easter egg
Doomed Space Marine
Not unlocked yetFind the fourth easter egg
Affluent
Not unlocked yetGet 10,000 coins in the campaign
Rich
Not unlocked yetGet 100,000 coins in the campaign
Millionaire
Not unlocked yetGet 1,000,000 coins in the campaign
Mass murder
Not unlocked yetKill 2,500 enemies in the campaign
Massacre
Not unlocked yetKill 25,000 enemies in the campaign
Genocide
Not unlocked yetKill 250,000 enemies in the campaign
Survivalist
Not unlocked yetSurvive the castle collapsing
Crystal Lich
Not unlocked yetKill the Crystal Lich in the survival level on medium difficulty without having any crutches enabled
Hard Crystal Lich
Not unlocked yetKill the Crystal Lich in the survival level on hard difficulty without having any crutches enabled
Midway
Not unlocked yetAir-walk between the start and the end!
The Grisly Combination
Not unlocked yetSolve it like it was E1M4
Worse than Ghost and Goblins
Not unlocked yetFail, where they fail: http://www.youtube.com/watch?v=-IAVCdu_DDs#t=467