DOOM + DOOM II

Rip and tear until it is done.

Kill one of every enemy.

Complete a level on Nightmare difficulty.

Complete any monster-filled level with 100% kills without getting hurt on Ultra-Violence or higher.

Complete 8 different levels sequentially under par time without dying on Ultra-Violence or higher.

Gib three or more enemies with a single rocket explosion.

Kill 2 enemies with a single barrel explosion.

Cause an enemy to kill another enemy.

Finish a level with 100% items picked up.

Find a secret level.

Complete any monster-filled level with 100% kills, items, and secrets.

Obliterate 50 enemies with a single shot of the Calamity Blade.

Reach the end of 'DOOM'.

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'.

Get 25 kills with your Fists in a single level.

Get 100 Chainsaw kills.

Finish off a Cyberdemon with the Pistol.

Get 3 multi-kills with the Shotgun.

Kill 4 enemies in 1 shot with the Super Shotgun.

Shoot 200 bullets consecutively with the Chaingun.

Kill 5 enemies in 5 seconds with the Plasma Rifle.

Kill only a single enemy with a BFG9000 blast.

Crush a corpse in a door.

Finish a level with 200% armor and 200% health.

Find a secret area.

Kill all monsters in any monster-filled level on 'Hurt me plenty' or higher.

Get 20 kills using the berserk powerup in a single level.

Immolate a total of 30 arachnoid enemies with the Incinerator.