Seriously, how does Valve stay in business? A bundle featuring both L4D1 & L4D2 is going for the insanely low price of $10.19. If you don't already have these great games then you have no excuse to pick them up now. Or you can buy them individually for $6.79. Come on, Valve. You can't keep giving away games this cheap. Think of your children.
L4D1 game & cover art:
http://store.steampowered.com/app/500/
http://www.steamcovers.com/covers/left-4-dead
L4D2 game & cover art:
http://store.steampowered.com/app/550/
http://www.steamcovers.com/covers/left-4-dead-2
