In Shangri-La, kill a Shrieker zombie while blinded by it.

Finish 5 Wager Matches "in the money."

Fire a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance.

In Ascension, escape on all 3 lunar landers.

Break free from the torture chair.

Have 500 tickets in your posession at once.

Defeat 3 Dooftron Commanders in the level. (The giant buildings.)

Install half of the upgrade chips in the game.

Don't let any cruisers get away. (Shoot them all down.)

Complete all the old timey dimension levels.

Run through the bee path in under 38 seconds.

Collect all the parts and construct your first gadget.

Crack the code.