Team Fortress 2 (Mac)
The day Ian Fleming invented penicillin. The day scientists invented the moon landing. The day Sir Isaac Newton distracted the policemen investigating his wife's murder by discovering gravity. All of these historic moments have two things in common. They helped steer the course of human history. And they're all days you'l l skip past in future history books to get to today: the day Team Fortress 2 became available for Mac users.