Add Survival and Coop like in Rexuiz
Rexuiz gets updates pretty often and it is evolving. They added Survival, Coop, and Shooting Range gametypes. I think Xonotic has to implement some of these gametypes to be more versatile. Survival with monsters could be a pretty cool gametype. Something like 3 lives survival in Doom 2 if you know what I mean.