Complete the tutorial.
Complete all levels of the game.
Complete the Headshot challenge.
Kill 100 Red Dudes with a sawed-off shotgun.
Kill 100 Red Dudes with an Uzi.
Throw 100 objects.
Kill 100 Red Dudes with melee weapons.
Complete the Speedrun challenge.
Move for at least 6 hours in-game.
Complete all the challenges.
Complete the Hardcore challenge.
Kill one enemy with each bullet in a pistol.
Use Mind Wave for the first time.
Complete a level while lying on the floor.
Kill 3 Red Dudes with a single dual Uzi burst.
Complete the game in less than 10 minutes.
Complete the No Death challenge.
Punch a single Red Dude at least 5 times in a row.
Cut a few bullets in a row using a bladed weapon.
Complete the Speedrun Game Time challenge.
Dodge 4 bullets at the same time.
Kill an enemy while not looking at him.
Find every secret in the game.
Kill 100 Red Dudes with a pistol.
Complete the game in one sitting.
Complete the game with throwables and punches only.