Stun 3 enemies at once with a Radial Stun Blast.

Complete a chapter without dying (Except Chapter 1).

Sneak past a group of enemies without alerting them.

Rescue Trip 3 times after she has performed an EMP.

Vanquish the summoned beast in the watery depths

Be on the winning team for four consecutive victories in any team based game in public matches.

Activate all of the spikes at once in the Spider Tomb spike field

Complete any level-specific Reward Challenge

The player has purchased every slot in one of the Plasmid or Tonic tracks

The player has successfully completed 50 hacks

The player has defeated Peach Wilkins

100 Chainsaw kills