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There's a Resident Evil 5 demo knocking about for the 360
that you can download and burn to DVD. This thread contains links and instructions:
http://www.rllmukforum.com/index.php?showtopic=197812
Having a partner around all the time is a bit weird, but there are some genuinely hairy moments in here. It's gone even further down the action route than RE4 did. Happily, the game still has those lovely men with bags on their heads wielding chainsaws. Mostly it looks very nice (very grimy and grim) but has some horrific screen-tearing if you're using a VGA lead to connect it to your TV/monitor.
It all seems a bit 'business as usual' after RE4, which is fine but hopefully it'll get a bit more interesting further into the game.