Forts is a physics-based action-RTS, where players are challenged to construct custom bases and destroy their opponents in a battle for the last of Earth's natural resources. Construct an armored fort while collecting resources. Arm it to the teeth. Develop your technology to unlock advanced weapons, then target weak points in your opponent’s fort. Shoot down incoming missiles and patch up damage before your fort comes crashing down. Defend your reactor at all costs! - Build forts of any size and shape, as you fight. - Up to 9 players in online multiplayer with co-op and team death match. - 28 mission single-player campaign. - Challenging skirmish mode. - Unlockable tech-tree. - Ten unique weapons. - Three factions. - Powerful replay system. - Built-in level editor. - Designed from the ground up to support mods. Source: The Developer Website.