preordered it, played the ARG, unlocked it at 11 pm monday night, played until 6am tuesday, went to sleep for 2 hours and finished it tuesday morning just in time to go to work.. replayed co-op all day today.
It's reminiscent of when I first got Ocarina of Time at age 12: it completely changes the way you think about video games. It's like what Star Wars or Avatar did for movies.
"When life gives you lemons, don't make lemonade.
Make life take back the lemons back! Get mad! I don't want your damn lemons! What the hell are these?" -Cave Johnson