Sega Master System / Mark III / Game Gear
Some real no good varmints have been a-stirrin' up trouble in downtown Tombstone, a-killin' an' a-pillagin' an' a-generally not being very nice at all.
The low-down tin-horn sheriff has turned chicken and been run out of town, and you're the community's only hope; besides, there's a reward of four bags of gold in it for you. Saddling up your hoss you ride into Tombstone, gun cocked, ready for the bad-hats.
If you're keen on shooting gallery style games, this is worth taking a look at. It's by no means a brilliant game, but if you're after a something to use with your light gun (and don't forget this doesn't work with a joypad), you could do a lot worse than this.