Oh Rats is a two-player turn-based casual strategy game where players must use their rat population to expand their territory, and destroy the other colony of rats. The artistic style of the game is a mix of rounded shapes and minimal line art, and it lends itself well to the cute and casual nature of the game. Players are charged with spending their rat population to build colonies or rat units that can move around the hexagonal board. Having more rats means a player can spawn more units to spawn more colonies and attack the opposing player's rat units and colonies. Players must decide on how to spend their rats, as leaving yourself with no rats leaves you without the ability to build more units or colonies. Players can either be victorious through brute force or by careful thought out strategy. The player that either takes the home colony or has the largest rat population at the end of a set number of rounds is the winner!