Valve's Gabe Newell once commented that World of Warcraft wasn't so much a game as a platform in its own right. Well, he's been proven right by respected puzzle game developer PopCap - it has decided to release its classic, Bejeweled, as a free game-within-a-game for World of Warcraft.
PopCap has re-written Bejeweled as an "add-on" - a small plug-in program for WOW, normally used by the community to modify the game's user interface.
As well as Classic and Timed modes, the game features a special Flight mode which pops up automatically every time you take an in-game flight, challenging you to score as high as you can before you land. The game also fires up automatically if you die ahead of your friends during a raid.
Bejeweled also features its own achievements and and "skill system", mirroring WOW's.
Bejeweled for WOW will be released, for free, on PopCap's site later this week.