Commodore Amiga 500

The Amiga that mattered commercially: the 1000's architecture in a one-piece wedge at a price a family would pay, and consequently the machine that owned European home computing between 1988 and 1992. The games written for it — Lemmings, Sensible Soccer, Speedball — defined a generation. Check the battery-backed clock on any accelerator and the electrolytics; both leak and eat boards.