Sega Master System / Mark III / Game Gear
This wacky sports sim has six events: half-pipe, foot bag, surfing, roller skating, BMX riding and frisbee-throwing.
From the start you've got an option to play in one, all or some events, or just practice them: none are so hard that you'll smash your Sega, nor so easy that you'll master them in an hour.
The graphics on all are pretty impressive, the animation smooth - but it's the competitive element that makes this a winner. Whenever you play it, it's totally compulsive. A must for your Sega.