Sega Master System / Mark III / Game Gear
This wacky horizontally scrolling shoot 'em up has the wildest, most colourful graphics ever seen. The object is to patrol the environment and blast all the big motherships that hover around the wrap-around landscape. Once they're all destroyed you have to take on an end-of-level baddie.
As we've said, the graphics are very colourful, but they're nicely drawn and give the game plenty of character. The gameplay is very addictive indeed, and there's plenty to challenge a hardened shoot 'em up fan.