Use the berserk
Complete episode 1
Complete episode 2
Complete episode 3
Your first kill
Your first secret
Get through a level without damage
Kill all enemies in a level
Find a map
Finish a level with less than 5 health
Finish E3M10 in nightmare difficulty
Finish a level without killing anyone
Finish a level 100 percent
Customise your game
You died
Start the game in nightmare difficulty
Grab the shotgun
Use a skull switch
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