Here is the full list of all 12 Comix Zone achievements worth 200 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox 360.
You rescued Alissa and completed the game.
You scored 50,000 points.
You used a paper airplane.
You scored 30,000 points.
You completed Episode 3.
You completed Episode 2.
You finished the first page.
You scored 10,000 points.
You restored your health with Iced Tea.
You used the dynamite.
You collected Roadkill.
You received both endings.