Gremlin have two compilations out this month, both part of the Ace series which started with Karate Ace. There are seven games: Xevious, Trantor, Exolon, Zynaps, North Star, Cybernoid and Venom Strikes Back. As you can see from the ratings, you're getting quality for your cash.

There's a nice mixture of straight shoot-'em-ups and mixed shoot-and-think games, Exolon and Cybernoid being the best of the bunch, but the rest still put up a good fight.

Well worth getting, even if you have half the games already.