Once again Valve show other game developers how to create genuinely unique and immersive title. Every aspect of Left 4 Dead has been refined and tweaked to perfection. It's addictive and atmospheric, and it contains undoubtedly the best co-op gameplay DarkZero has seen yet. The survival horror genre has just been revolutionised, the zombie Horde is beating at you door. Grab a shotgun and fight for your life!