In the wild world of computer gaming, there are a few perceived wisdoms; all US Gold coin-op convos are boring (not always true), all Domark games are crap (more or less true) and all Dinamic games are far, far too difficult.

So how true is that last statement then? Here we get another opportunity to examine one of the items of evidence for the prosecution. Navy Moves is the sequel to Army Moves. It doesn't take a degree from Sherlock Holmes University to realise the blistering action of the first game has been moved from land to sea, and your bum, once attached to the seat of a jeep, is now fixed firmly to the vinyl of a dinghy.

The idea is to waggle the joystick furiously in such a way that your dinghy doesn't crash into any of the big mines that someone has absent-mindedly left lying all over the ocean. This is tricky. Very tricky. The amount of practice, practice and skill required to get through this first level is phenomenal.

If you manage it, you are then presented with the second part. This is set on the enemy sub, things get a tad easier, and enemy guards are the main opposition. But most people will give up before reaching this stage.

A good game, spoiled by the Spanish softies' traditional over-high difficulty level.