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

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

Find a secret level.

Finish a level with 100% items picked up.

Kill 2 enemies with a single barrel explosion.

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

Sold an item to Duimuk.

Defeated Viper.

Woke a dormant ghost from its slumber.

Upgraded abilities by unleashing the power of Soulstones.

Complete Ghosts from The Past quest.

Score 200 points at the shooting range.

Complete Bank Heist quest.