PC gamers on Steam can get the co-op horror game Ultimate Zombie Defense for free for a limited time. Once it's added to a player's library on Steam, it's free to keep forever, so fans of the genre ...

It's still got a download size less than 30MB.

Zombie games keep the genre alive and offer varying gameplay experiences. Each game has unique aspects, such as atmosphere in Dead Frontier 2 and co-op in Unturned. Free games like No More Room In ...