Complete the Metroplex.

Complete the Disposal Area.

Complete the Recycling Center.

Complete the Fusion Plant.

Complete the Hyperion Labs.

Kill two enemies at once with an SMG ricochet.

Kill an enemy by jumping on it.

Die in the tutorial.

Finish a boss with a hyperblast.

Finish a boss with a level 3 hyperblast.

Earn a tyderium medal when completing a level.

Earn a tyderium medal on all levels.

Earn a streak of 69.

Earn a streak of 100 (or more).

Kill an enemy with a deflected attack.

Complete E1L4 without killing Zombo.

Kill two enemies with a single pistol shot.

Earn a multikill of 2.

Earn a multikill of 10 (or more).

Kill Mechron by jumping on him.

Earn 10,000,000 points.

Complete a level having collected a tyderium coin.

Collect all of the tyderium coins.

Raise your max. health to 150.

Raise your max. armor to 150.

Start a game by selecting the secret difficulty level.

Complete the tutorial by disregarding all the instructions!

Complete a level using only the Bravestar.

Melee a corpse to extend your streak.

Parry an attack from a crusher.

Survive a rocket jump from the bazooka's level 3 hyperblast.

Complete a level on Balderdash.

Discover a BIG secret!