Which obscure consoles have you played on?

When I was a kid my family had a TI-99/4A. The 99 series was Texas Instruments’ only real foray into the PC and video game market, and it failed to be competitive with Commodore, Atari, and Amiga. Most games were booted from cartridges. My favorites were Hunt the Wumpus, a sort of early survival-horror with a turn-based grid...