Invasion Force

Invasion Force is a science fiction action video game produced by the Tandy Corporation in June, 1979. Invasion Force was a text-based, real-time, Star Trek style game.
Gameplay.
The player is in control of the USS Hephaestus and must make decisions to manage resources, such as fuel and ammunition, so the ship does not become stranded in space while fending off "Jovian" attacks. There are 10 levels of difficulty.
Reception.
Glenn Mai reviewed "Invasion Force" in "The Space Gamer" No. 36. Mai commented that "If you don't have a "Star Trek" game and want one, get "Invasion Force"."