Orbit - MAME - Shoot 'em up

The game level can be selected at the beginning of the game or after game select button has been pressed. Press the buttons from 1 to 10. Bounce Back - Sets boundaries around perimeter of the TV monitor screen. Example: Starship immediately reverses direction after reaching boundary. Normally perimeter boundaries do not exist. Negative Gravity - Sun radiates gravity outward to perimeter boundaries of the TV monitor screen. Normal sun state radiates positive gravity (positive gravity is inward toward the sun). Zero Gravity - Sun does not radiate gravity. Black Hole - Invisible sun with any selected gravity. Space Stations - Two space stations orbit around sun. Each player is designated a specific space station on which he may land for repairs, fuel and shells. When player starship touches opponent's station it is immediate annihilation. Unlimited Supplies - Unlimited fuel and ordnance (fire power). Stars - Remove stars from playfield. Strong Gravity - Unusually strong positive gravity.