New Civilization IV demo

Firaxis has released a new demo for Civilization IV, the latest instalment in the hit turn-based strategy series - and it's now available for download.

The demo includes a tutorial and gives you the chance to take a sneak peek at the Greek, Indian, Roman and Incan empires. It's playable for 100 turns.

If you like it so much you're planning on buying the full game, don't forget that Civ creator Sid Meier will be at HMV Oxford Street this Friday - so you'll be able to pick up a signed copy of the game if you turn up between 1-3pm.

Civilization 4 is out now.