No, thats a bot zombie mod that looks like ROTU. You can play ROTU when you took at least 6g of dried mushrooms before but I prefer zom_db in general. Its a PVP zombie mod. Back in the good old times there were servers with 50 people all the time.
This mod has great tactical depht, there are multiple zombie classes and abilities. A shame that no one plays it anymore. I tried to convince AR51 to update their server to 1.7 but they don't take it serious. Here is a link. You had a server with this mod running, why was it closed? No one playing?