Sega Master System / Mark III / Game Gear
R-Type has been hugefy successful on both coin-ops and home computers, and console owners certainly would not want to miss out.
The level design and adversaries are exactly the same as all other versions - familiar territory indeed - and the weapon power-ups are the same too, well impressive when it's all attached, boasting several kinds of laser, homing missiles, drones and speed-ups. All of which is needed to deal with an enormous number of attacking aliens and deadly end-of-level guardians that take a lot of killing.
The two bad things to note about this version are that ship movement is sluggish and when there are a lot of sprites on-screen it flickers horribly. Apart from that it's just as addictive and thrilling as ever. One of the best shoot-em-ups on the Sega.