Homeworld is a real-time strategy video game. Set in space, the science fiction game follows the Kushan exiles of the planet Kharak after their home planet is destroyed. In each of the game's levels, the player gathers resources, builds a fleet, and uses it to destroy enemy ships and accomplish mission objectives. The player's fleet carries over between levels, and can travel in a fully three-dimensional space within each level rather than being limited to a two-dimensional plane.