Here is the full list of all 27 Max: The Curse of Brotherhood achievements.
You stole back your kid brother like a boss!
You defeated Mustacho without dying even once!
You escaped the Beast without dying!
One Sea of Sand, 2 Earth Pillars, 3 drawings - piece of cake.
Time Marches On. (Rang a bell)
And just in time for tea! (Reached the old lady in under 5 minutes)
You found and assembled the entire Amulet for the Old Lady!
No Evil is safe from you and your Grabby Hands.
You defeated Mustacho and saved your brother!
You didn't die in Death By Lava.
Can't Touch This
It's all in the fingers and fiery balls of death.
You lit 15 enemies on fire. Oh the things One does for brotherly love.
You found and assembled 12 pieces of the lost Amulet.
You drew 200 water streams.
You destroyed 50 of Mustacho's Evil Eyes. His control is diminishing!
You drew 200 vines.
You found and assembled 6 pieces of the lost Amulet.
You destroyed 25 of Mustacho's Evil Eyes. Consider his surveillance network impaired.
You drew 200 branches.
Guts and Glory
What goes around, comes around. Right in your face.
Up you go.
You tamed the Spikester! ...Lucky you.
You destroyed 5 of Mustacho's Evil Eyes. That'll teach him.
You found the first piece of the lost Amulet.
You used the magic marker 25 times.