Complete episode 1

Complete episode 2

Complete episode 3

You died

Shoot the barrel

Use a cheat code

Your first secret

Your first kill

Finish a level 100 percent

Find a map

Kill all enemies in a level

Customise your game

Finish a level with less than 5 health

Finish E3M10 in nightmare difficulty

Start the game in nightmare difficulty

Use a skull switch

Grab the shotgun

Get through a level without damage

Finish a level without killing anyone