Kill an enemy with Splatter Smash.

Stomp on 1000 Boreworms.

Splat 100 enemies on a wall with a weapon.

Complete Phase 4: The Meat Factory.

Unlock 5% of Dr. West's journal.

Kill an enemy with an enemy's head.

Purchase a skill.

Get 50 kills with non-fleshy weapons.

Splat an enemy on a wall with a weapon.

Perform a Splatterkill.

During the first fight with Wesker, damage him a set number of times.

Purchase all available alternative costumes in Bonus Features.