Hairball is a game about stomach acid and cat vomit and it's the story of Tim. Tim is a bacterium who enjoys spending his days languishing in pools of morning dew. Tim quite enjoys his life of leisure. Well, he did, before a cat ate him. Now Tim is stuck in the murky pools of stomach acid and jagged chunks of rotting meat and bone that make up the stomach lining of Mr. Tibbles, the household pet. With only minutes until his inevitable dissolution, Tim has to think fast and act fast. Luckily, Tim has a plan. If he can gather up enough hair and detritus he can form a hairball large enough to cause Mr. Tibbles to retch him up. It won't be easy, and it certainly won't be pretty - but it's all he's got.