Left 4 Dead FTW. Best co-op experience ever... best game of 2008.

I own legitimate copies of Civilization 4, but I have to install a crack so I can play it without the CD in the drive. Its not just the inconvenience of putting the CD in the drive but it is also wear and tear on my paid copy. As a paying customer I am being punished with DRM, and have to turn to 'pirating' tactics to enjoy my game without destroying it.