Rexuiz is a continuation of developement of Nexuiz Classic project which was, by the way, abandoned by "Another game" developers. They were asked many times to bring back Nexuiz Classic gameplay to their game but they refuse to do so, their motivation being imposing their own interpretation of what game balance should be and forcing what they called "pro duel gameplay".
And it`s rather amusing hearing about how "Another game" is much better and how Rexuiz is "just a copy" of it while at the same time they are implementing features that have been presented in RocketMinsta Rexuiz|Nexuiz mod for years ago.