Sega Master System / Mark III / Game Gear
Take our R9 fightor out into eight levels of horizontally scrolling madness, where the main object involves wasting the hell out of the assorted minions of the Bydo Empire with an assortment of bolt-on weaponry including The Force. This detachable item protects your fighter from fire either in front or behind and can be powered up itself with a number of attachments including reflective laser fire, ground-hugging destructive photons and a lot more besides.
R-Type on tho Sega is fab, with all the levels of the arcade and a number of secret bonuses. However, although it's got a great line in playability, the sprites sometimes tend to suffer from chronic flicker - especially when a lot is happening on screen. Still, shoot 'em up fans should seek this out immediately!