Costume Quest is an action adventure RPG developed by Double Fine Productions Inc. It's a game set during the Halloween night. Walk across your suburban neighbourhood, enter a mysterious village carnival, and visit a monster packed shopping centre and along with your friends, defeat the meanest and worst of monsters! Collect candy, points, cards, quests, battle stamps and everything else you'll manage to grab from your well-meaning neighbours, every item will matter during the Grand Halloween Battle! When in combat against these dreadful creatures, you will turn into one as well, the monster type will depend on your costume! Different costumes, different monsters, thus different powers! Choose wisely, as the Halloween Beings you'll face aren't the weak type!

Costume Quest is a role-playing video game developed by Double Fine Productions and published by THQ. In the game, the player controls a child that is trick-or-treating with their twin on Halloween night when they encounter a monster that kidnaps the ...   more on Wikipedia