10 000 enemies killed
1000 enemies killed
One hour in slowmotion
Died 250 times
Second day completed
25 Doors destroyed
First boss completed
Picked up 50 weapons
100 enemies killed
Completed a level without slowmotion
First weapon unlocked
Completed a level on first try
First level completed
First enemy killed
Complete first day without dying on medium difficulty
Complete the first and second day without dying on medium difficulty
All challenges completed on medium difficulty
All weapons and upgrades unlocked on medium difficulty
Game completed on medium difficulty
