Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Bloodsport.	Play through any World, taking damage on each level, but don't pick up any health kits. Oh, and don't die.
Dead or alive, you're coming with me!	Kill 1987 bad guys with Bionic Cop, without dying.
Die Hard.	Kill any boss with the last bullet in your gun.
Do it now!	Kill Yatcha Queen solo, using only melee attacks.
Game over man, game over!	Get every other achievement in the game.
Get to the Choppa!	Deal with a Choppa!.
Groovy!	Complete any World using only the Sawn-off and the Chainsaw.
I don't need the gun!	Defeat Gordon Bennette using only melee attacks.
I'm an ordinary guy.	Burn down an Objective Building.
Knock knock!	Kill an enemy within 2 seconds of starting a level.
Lethal Weapon.	Kill every bad guy in a level using only one of your weapons.
Only in a re-run.	Complete NG+.
Sensational!	Defeat 10 enemies in Killionaire by getting them to kill each other with their special weapons.
Stick Around!	Play through the entire game in one session with 3 friends.
That's not a knife. This is a knife	Get the most melee kills in a multiplayer game.
The best kind of Tomorrow.	Achieve a bodycount of 199 in a single World.
This is heavy.	Use the Matrix 80 for the first time.
To Hell With You!	Defeat Old Ramishar using only melee attacks.
What Day Is It? The Date! What Year?	Kill 120584 enemies.
You know what I like best? The price.	Buy a gun priced over $50000.