Mission Omega is a computer game published in 1986.
The United States of Europe vessel Windwraith has been sent to intercept a mysterious object the size of a small moon which is speeding towards Earth. Robots must infiltrate the mystery-ship (dubbed the "Omega") and deactivate it within the hour or Earth will be destroyed.
Gameplay is a mixture of arcade adventure, maze game and strategy. The player controls robots (which are designed, built and named in-game) around the interior of the Omega and must shut down its four reactors. These robots have a limited amount of artificial intelligence and can be programmed to take set routes or allowed to explore of their own accord. The player can also directly control the robots. Occasionally, simple puzzles (often involving setting levers correctly) must be solved or hostile robots aboard the Omega must be combatted.
The player has one hour in real-time to deactivate Omega's four reactors.
Source: Wikipedia, "Mission Omega," available under the CC-BY-SA License.