So Team Fortress turns 15 today. For the next 24 hours, if you play TF2 you will get a free party hat (more hats yay...), A free noisemaker (which will probably be annoying as hell) that have unlimited uses on TF's birthday and can only be used each year on that day! Free cake and gifts (in the form of remodeled health kits and ammo packs)!
You will also see some birthday items of previous years including: a TF birthday beach ball and the Celebration Gib, which causes gibbed players to explode in a shower of balloons and confetti (which sounds pretty cool)
I never have been about for any of Team Fortress's birthdays so I think I may go for a couple games of 2fort and get my free hat. Also I haven't played any TF for a week or 3 so it's a good enough excuse.