No More Room in Hell the long awaited Source zombie modification.
Certainly a fine example of how to do the topic justice. The gameplay is exquisite, and the maps are of a particularly appealing nature. And perhaps the cherry on top, the development team is still hard at work making this game even better. Rarely has such a display of talent and hardwork been shown for so little reward, this truly is a labor of love. And with the deluge of zombie games flooding the market now-a-days, the bar has risen ever higher for games such as these. Yet, they have still managed to go above and beyond the quality expected from a free title.