The Left 4 Dead on Steam Page announces the promised "Freaky Friday" event is now underway, offering 24 hours of free play in Left 4 Dead. They also announce a sale for this weekend offering the multiplayer zombie shooter for 40% off. Meanwhile, Steam has another new automatic update for Left 4 Dead that fixes some Survival mode issues and a couple of other bugs. Finally, the Left 4 Dead Blog describes the new game stats pages Left 4 Dead players can now access, allowing them to see statistical breakdowns of their play in various modes, and compare their success with other players.