Story:Battle-Girl, by Ultra/United, is an arcade style top-down shooter for Mac OS and Windows released in September 1997. Gameplay is similar to Robotron 2084, but uses vector graphics and different level designs like Tempest. High-pace arcade action.
The 2nd computer I owned was a Mac LCII and this game made it feel like a real gaming machine (my 1st was a Trash-80). Crazy fast action, decent vector graphics.