Kill 4 enemies in 1 shot with the Super Shotgun.
Reach the end of 'DOOM'.
Complete 8 different levels sequentially under par time without dying on Ultra-Violence or higher.
Find a secret level.
Complete any monster-filled level with 100% kills, items, and secrets.
Kill only a single enemy with a BFG9000 blast.
Get 25 kills with your Fists in a single level.
Get 20 kills using the berserk powerup in a single level.
Complete a level on Nightmare difficulty.
Complete any monster-filled level with 100% kills without getting hurt on Ultra-Violence or higher.
Finish a level with 200% armor and 200% health.
Finish a level with 100% items picked up.
Finish off a Cyberdemon with the Pistol.
Kill 5 enemies in 5 seconds with the Plasma Rifle.
Get 100 Chainsaw kills.
Crush a corpse in a door.
Shoot 200 bullets consecutively with the Chaingun.
Gib three or more enemies with a single rocket explosion.
Cause an enemy to kill another enemy.
Get 3 multi-kills with the Shotgun.
Kill 2 enemies with a single barrel explosion.
Kill all monsters in any monster-filled level on 'Hurt me plenty' or higher.
Find a secret area.
Rip and tear until it is done.
Kill one of every enemy.
Immolate a total of 30 arachnoid enemies with the Incinerator.
Obliterate 50 enemies with a single shot of the Calamity Blade.
Reach the end of 'Sigil'.
Reach the end of 'DOOM II'.
Reach the end of 'No Rest for the Living'.
Reach the end of 'Master Levels for DOOM II'.
Reach the end of 'TNT: Evilution'.
Reach the end of 'The Plutonia Experiment'.
Reach the end of 'Legacy of Rust'.
