Rip Off

Rip Off is an arcade game released in 1980. It was ported to the Vectrex.

Gameplay
You and another player both control fighter ships that can rotate, thrust, and fire within an enclosed space. Your job is to protect several energy crystals from bands of various alien raiders who are out to steal them. You start off dealing with the slower ones and then eventually face the tougher ones. You have an unlimited number of fighter ships to use, but you don't have a lot of time.