Movement, combat, and shields all drain the energy supply of the "Enterprise", which can be restored by flying to a starbase. In some versions of the game, there are additional options for emergency situations, such as calling for help from a starbase, using the experimental Death Ray, loading raw dilithium crystals into the warp drive, or abandoning ship. Movement commands take up time depending on how far the player is moving. The game ends when the "Enterprise" is destroyed, all Klingons are destroyed, or the time limit runs out. A score in the form of a ranking is presented at the end of the game based on energy usage, damage taken and inflicted, and any remaining time.