Minigore (2009)

Players control the main character, John Gore, in a world called "Hardland." Gameplay revolves around Gore shooting creatures called "furries", who are trying to kill him. A cloverleaf will generate randomly after a certain number of furry kills. Collecting three clovers will turn Gore into a minotaur, granting him invincibility and allowing him to stomp on enemies. This lasts for about 15–20 seconds. The player has three lives and accumulates points for each furry killed. There are also OpenFeint and Game Center leaderboards and achievements.