Here is the full list of all 36 Max: The Curse of Brotherhood achievements worth 1,000 gamerscore.
You didn't die in Death By Lava.
You defeated Mustacho and saved your brother!
You defeated Mustacho without dying even once!
No evil is safe from you and your grabby hands.
You found and assembled the entire Amulet for the Old Lady!
You took care of that pesky Beast once and for all!
You stole back your kid brother like a boss!
You found your kid brother!
You lit 25 enemies on fire. Oh the things one does for brotherly love.
It's all in the fingers and fiery balls of death.
You drew 200 fireballs.
You destroyed 50 of Mustacho's Evil Eyes. His control is diminishing!
You found and assembled 12 pieces of the lost Amulet.
You drew 200 water streams.
You escaped the Beast without dying!
You escaped the Beast - again!
Being afraid of the dark is for sissies anyway.
You destroyed 25 of Mustacho's Evil Eyes. Consider his surveillance network impaired.
You found and assembled 6 pieces of the lost Amulet.
You made the world a little greener.
You drew 200 vines.
Huh, time really DOES slow down when you're in danger.
Killed a Bomber with his own bomb.
You drew 200 branches.
Up you go.
Time Marches On (Rang a bell.)
You made it safely past the Stone Pillars of Black Rock Canyon.
You made 5 critters explode and survived it. Your clothes might need a rinse though.
You tamed the Spikester! ...Lucky you.
One Sea of Sand, 2 earth pillars, 3 drawings - piece of cake.
You destroyed the first 5 of Mustacho's Evil Eyes. That'll teach him.
You found the first piece of the lost Amulet.
You drew 200 earth pillars.
You used the Magic Marker 25 times.
You completed a level without dying.
And just in time for tea! (Reached the old lady in under 5 minutes.)