Reach the end of 'DOOM II'.

Get 100 Chainsaw kills.

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

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

Finish off a Cyberdemon with the Pistol.

Complete a level on Nightmare difficulty.

Shoot 200 bullets consecutively with the Chaingun.

Find a secret level.

Kill 2 enemies with a single barrel explosion.

Defend a convoy.

Choose a side.

KOF95: Defeat Saisyu Kusanagi.

Clear Arcade Mode with every character except for Athena and Red Arremer in any difficulty level, without switching characters during each playthrough