The RPG of Trey Parker and Matt Stone's infamous cartoon creation has proved to be a hit, prompting a retailer war to be the one you get your copy from.

Amazon currently have the PS3 version available for just £18.50, saving you £16.50 on the RRP of £35.

Xbox 360 users needn't feel hard done by either. Amazon may not be being quite as kind to you, but luckily you can get it at Tesco for exactly the same bargain price (£18.50).