Devastate the opponent's body as much as possible!

Kill 666 enemies.

Finish a chapter without reloading with bullets in the chamber.

Finish any chapter with help of Player 2.

Let Player 2 join the game while in a middle of a campaign.

Beat the Magician at the end of the fourth chapter.

Beat Hermit at the end of the third chapter.

Don't destroy any glass panels in Chapter 2.

Save a Scientist.

Kill 1000 players by any means.

Bump into 3 people while rolling on the ground before getting up

Jump out from an airplane 101 times.

Kill 30 players with grenades.