Kill your first enemy

Collect 50 bottles

Find a calendar

Complete first level

Kill 30 enemies

Complete the car level

Kill the first boss

Perform 50 slides

Kill 72 enemies

Kill 150 enemies

Kill the second boss

Complete the level on skateboard

Kill the third boss

Don't talk, just crouch till you drop. 44 times, to be exact

Complete the level on boat

Kill the fourth boss

Jump 200 times

Die 15 times

Blow up on three mines

Complete the game