Rescued Special Bot trapped in Memory Meadow.

Finish off a Cyberdemon with the Pistol.

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

Finish a level with 100% items picked up.

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 only a single enemy with a BFG9000 blast.

Get 25 kills with your Fists in a single level.

Beat the game in under 4 minutes.

Toss a coin.

Start playing Shamplin 2.

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

Kill 2 enemies with a single barrel explosion.