We'd originally planned to tease out today's update over the course of 19 deviously brain-twisting blog posts, each containing a mercurially complex riddle hinting at the nature of the update. Unfortunately, everybody seems to have cracked the subtle rhyming codex embedded in our first blog post, which was actually supposed to be the most unsolvable of the 19. So anyway. Team Fortress 2's available on the Mac now. Or is it? No, it is. Sorry, that was Riddle #17. It seemed a shame to let it go to waste. As part of the celebration, TF2 will be FREE to play all weekend, and 50% off to purchase. We've also got a little treat for anybody logging into the game from a Mac.