Sega Mega Drive / Genesis [1990, 1992, 1998] 

This was probably the first games console to hit the big time. It was the follow up to other consoles such as the Master System, and was the making of hand-held consoles such as the Game Gear.

The Mega Drive had 16-bit graphics which ran off a CPU at 7.61 MHz and had a capacity of 64 Kb in memory.

The Mega Drive had fierce competition from Nintendo's equivalent, the SNES. Overall you could say that the Mega Drive did better due to Sega building their console around a good game, Sonic the Hedgehog.