Havoc Brigade

Havoc Brigade is a humorous fantasy roleplaying game in which the players take on the role of a group of orcs and goblins.

"A one-shot tabletop RPG for up to six players (and one GM); contains system, illustrated characters, city map, antagonists and scenario details. The rules are written with an eye to make them easy to pick up and learn, and encourage stupid plans and wild distractions, so it's a great game for cons - or just to keep on your shelf if your regular game is called off on short notice."

Links:
Official Site
RPG.net Game Index