Also known as "The Arguments App"

It's easy to tell who's your enemy in Killzone 3 – the glowing red eyes and guns pointed at your face are a dead giveaway – but in real life it's not so simple. It's a good job, then, that Sony and Guerilla Games has created the Killzone 3 Know Your Enemies app for Facebook that aims to help you sort your friends from your foes.

Apparently the application analyses your wall posts and photo comments before assigning your friends ranks in the Helghast army: Ultimate Enemy, Infiltrator and so on, with an accompanying description and video. You can share the information with your friend – or enemy – and claim an exclusive Helghast outfit to wear in PlayStation Home. Just be warned: your wife, husband or significant other may be unmasked as your Ultimate Enemy.

While you're on Facebook, why not give Movemodo the old thumbs-up?