Successfully complete the indicated task to unlock the corresponding achievement.

Achievement	How to unlock
2 TIMES IN A ROW	Choose one up instead of new weapon.
A FRIEND OF MINE	Played coop mode.
A.A.G.	Sixth level completed.
AIN'T NO SUNSHINE	When sh... Fifth level completed.
DRUGS ARE BAD, M'KAAY?	Unlock secret ending.
EASY PEASY	First level completed.
FROM BEHIND	Seventh level completed.
FUCKING TINY PLANET	Fourth level completed.
HAWAII CLUB	Third level completed.
HOLY SHIT, MAN	Completed the story mode on Xtreme mode. You are crazy, seriously.
I HATE VIOLENCE	Killed 1000 enemies.
MOTHERSHIP	Completed the story mode.
OH BABY!	Choose new kind of weapons.
ONE. MORE. TIME.	Died 50 times.
POWERED'UP	Catch 10 powerups.
SOMETHING EXTRA	Unlocked secret mode.
WARMER THOUGHTS	Second level completed.
WHAT'S THE RUSH?	Finished the boss rush.