Expansions are the lifeblood of most massively multiplayer games, and Mythic's Dark Age Of Camelot is no exception. However, the latest add-on for the Medieval-themed fantasy RPG, New Frontiers, differs a little in its pricing policy: it costs nada. That's right, it's free.

In this case though, you'll be pleased to know that 'free' doesn't mean 'crap'. Instead, you get a complete revamping of the game's already excellent player versus player system, known in the Dark Age world as Realm versus Realm, or RvR. The realms - the English Albion, the Norse Midgard, and the Celtic Hibernia - are locked in perpetual combat over some 12 frontier zones.