The game has a single-player campaign, playable from two sides (more campaigns have been made by the community since release), and many maps, both included and user-created that can be played in Hotseat mode, over a LAN, on the Internet, or by email (PBEM). Up to 12 players can participate in a single game, depending on the map. Players have an isometric view of the map, which consists of hexagonal tiles, and can have up to three layers (surface, caverns, and depths). Units are arranged into groups (also known as parties or stacks) of up to eight units; a single such group occupies one tile. Cities occupy between one and four tiles, and other structures generally occupy a single tile.