There's a chance you may have heard of Tetris. No? We don't believe you. It's the video game equivalent of LEGO. It has become so absorbed into popular culture that people who haven't played it know what it's about, like Space Invaders or Tomb Raider.

And, like LEGO, anyone who comes into contact with Tetris becomes addicted to the simple-yet-fiendish fun on offer. The struggle with co-ordination and onscreen overcrowding to set up yet another line of blocks for clearance and breathing space makes it the undisputed king of puzzle games.

Tetris itself is timeless, but Tetris Worlds just isn't as appealing. In an attempt to sex up the game, garish colours, alternative modes and - crikey, Charlie - a story line have been added.

Thing is, the original Tetris is so finely balanced that altering it without changing what makes it so moreish and goddamn thumb-bustingly compulsive in the first place is tricky. Tetris Worlds is the perfect case in point. It has a pile of new modes, each one putting a slight spin on the standard formula. That's 'slight' as in 'very very slight', so much so that nothing new is added to the experience. It's just the same old game, the one that came free with Nintendo's Game Boy over a decade ago. In Hotlines mode, for example, all you do is clear lines at specified heights, and nothing more.

This is the video game equivalent of a digitally remastered Beatles re-release. Everyone, with the exception of hardcore completist fans or cave-dwelling newbies, will already have experienced it enough already. Unless you find the multiplayer particularly appealing (in fairness, it is great four-way fun), then you're better off seeking Tetris somewhere else. Maybe as a free and legal internet download, on your mobile, via digital telly or maybe buying a second-hand Game Boy and a copy of the original for much less than the RRP of this title.

While everyone should play Tetris at some point, playing Tetris Worlds is another matter. The main core of the game is the compulsive brain-bondage of old but, in terms of value for money, this is a 14-year-old concept with a token facelift and little else.

1. Timeless, addictive puzzling
2. Some multiplayer moments of fun
3. It's Tetris!

1. Nothing significant added to the concept
2. Not worth the cash

Power
Could have happened years ago. Doesn't bother with such Xbox features as custom soundtracks.

Style
Chilled music, vivid colours, a pointless plot and spacey settings. Millennial makeover by numbers.

Immersion
Requires cool concentration when things get fast. Can absorb you for ages - it is Tetris, after all.

Lifespan
Potentially limitless, as no two games are ever the same. If you're not done with it already, that is.

Summary
Adding Worlds to Tetris merely dilutes the original's impact. This is okay, but you don't really need to play it.