said by devrandom 
:L4D should be awesome, but some parts of it (particularly versus mode) feel like Zombie Panic: Source spruced up. I'm sure it'll be great, Valve wouldn't bother releasing it otherwise.
I still do want to pre-order it, but debating between the boxed and steam version (they're the same pretty much, sans getting a really creepy box cover to look at on your bookshelf).
Also, there was controversy over Valve partnering with EA (baron of super evil DRM) on Amazon (although it has been quashed I hear. EA is only the physical distributor). People seem to have been tagging it thinking it is DRM'd (aside from Steam's implied DRM).
i just went ahead and preordered it via steam. it saves me the time of going out and finding the best deal for retail. i'm not sure how its going to work for the retail, but previous valve retail products all you have to do is register the serial number in steam and it downloads it. so regardless it all goes through steam.
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