Neocron 2

"Global pollution, excessive wars and a perforated atmosphere have turned the planet into an almost lifeless sphere of toxic mud. Radiation is everywhere and most animals have either gone extinct or have mutated into bizarre monstrous creatures. The remnants of mankind seek protection from the desolate, scorched world and gathered behind the protective walls of giant cities. These few mega cities became the last lights of hope, in the darkness of Earth's final dusk... "

http://ng.neocron.com/