The final frontier is no longer space, but the mysterious world beneath the waves where strangely beautiful creatures glide up your mask and block your snorkel.
A little diver hangs by an airline from a boat on the surface. Armed with a spear-gun (and limitless spears), his task is to collect three items of treasure from the sea-bed beneath him.
There are 32 screens in Glug Glug, and the player's objective is the same in each one. The game isn't as easy as all that, though. In each screen there are all manner of marine nasties on the lookout for you.
Fish swim to and fro, jellyfish drift towards you, piranhas appear in shoals and follow you relentlessly, and crabs patrol the bottom of the screen.
As the game progresses, you also have to keep an eye out for sharks who will attack your airline, and mines which rise up from the sea-bed at the end of long chains and block your progress.
As soon as you play Glug Glug, you notice the resemblance with Ultimate's Jet Pac. There isn't a lot of difference between finding three pieces of treasure and collecting three stages for your rocket. There are also similarities between the two games' graphics and sound.
Glug Glug can be played by one or two players. It's made more enjoyable by a good choice of control keys, and it doesn't take long to get the hang of the game and start notching up some high scores.
CRL have produced a very playable game. The only possible objection could be that it is almost too playable and doesn't present enough of a challenge, but it's good fun and the later screens
should get even the most hardened gamesters into deep water.