Aside from brawlers, Portal 2 is the only game I remember finishing from start to finish in one go. No warp pipes, no shortcuts, just an eight-hour plow through puzzles, exquisite dialog and an oddly heartwarming reunion. As someone who typically bores with games regardless of quality after more than two consecutive hours, I was both impressed and a little frightened by how quickly Valve's puzzler drained an entire day from my weekend. Suddenly the sun was gone, leaving my blank, glowing word document as the only source of light in our living room.
Have you managed to accidentally clear a full game in a single session, or is there one you specifically set out to conquer as quickly as possible your first time through? Tell us about the games you've finished in one go and what compelled you to see it through, right after you check this week's Japanese hardware sales after the break!