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 scored 30,000 points.
You scored 10,000 points.
You finished the first page.
You used a paper airplane.
You collected Roadkill.
You used the dynamite.
You restored your health with Iced Tea.
Rescue Alissa and complete the game.
Receive both endings.
Score 50,000 points.
Complete Episode 3.
Complete Episode 2.