The threat of global warming has inadvertently plunged the world into a nuclear winter. Scientists tried to correct the greenhouse effect by detonating A-bombs at the earth's poles, but it's gone horribly wrong.

The world is now in thrall to the Viking Union, a hugely powerful organisation which controls the only means of transport - huge lumbering trains inhabited by the few human survivors of what was called Operation Blind.

Transarctica is the story of one of those trains. You're responsible for traversing the world, trading with remote human colonies and trying to uncover the mysteries of a forgotten past - do this and you can ensure the world literally has a brighter future. The first thing you notice about the Falcon version of this game is the sound effects and music - they lend a whole different atmosphere to the game than in the ST version. This is particularly evident in the train battles where ear-shattering explosion and machine-gun samples raise the tension level.

The graphics have also been enhanced - there are more, richer colours on-screen and the whole game feels much more realistic.

What you can't ignore is that Transarctica is seriously flawed as a game concept - guiding the little train around the rail map remains tedious and a succession of pretty static screens don't really compensate for a lack of action.

Even the train battles fail to grab the imagination as you shunt backwards and forwards trying to take pot shots at the Viking Union train alongside.

Like Ishar, Transarctica takes the Falcon's extra capabilities and tries to make something of them - there are more colours, great sound samples and quicker gameplay. However, it's hard to get worked up about trains and this version is unlikely to do it for you.

More colours and faster gameplay turns Transarctica into a more exciting proposition.

But the whole concept doesn't quite gel and leaves you uninspired.