It's an arena mode that has players facing off against waves of enemy zombies. (cogconnected.com)
Although competitive, they are close, and have admitted to having sought one another's advice as coaches in the past when facing off against other teams. (rocketlawyer.com)
You must survive, build and dominate in order to build your own kingdom while facing off against other players trying to do the same thing. (thatvideogameblog.com)