Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Brainiac (40 points)	Solve all puzzles.
Brothers in Arms (80 points)	Beat all bosses in co-op mode.
Greatest Show in the World (90 points)	Turn off the last TV set.
Helping Hand (40 points)	Kill 20 enemies in co-op mode.
I Hate Crystals (70 points)	Smash all crystals.
I Skipped Everything (40 points)	Congratulations, you skipped the story.
I'm All Alone (90 points)	Did you read the text at the very end of the game?
Insanity from the beginning (30 points)	The tree falls!
Invincible. (90 points)	Arena completed.
It's All Your Fault (30 points)	Die in co-op mode.
It's Cold in Hell (50 points)	Kill 50 frozen enemies.
Mental Genocide (100 points)	Kill everyone.
MWA-HA-HA! (90 points)	Do you know what insanity is?
New Adventurate (90 points)	Take a trip with Pam.
Not Right Now, Stan (30 points)	Chop down the tree.
Weapon Master (40 points)	Unlock all combos.