MuTaTioR Le choc des MuTaNs (Mutants: Shock of the Titans — that’s as close as I can get the translation) is a set of free wargames rules in French for combat between mutants in an arena. Google translate does a pretty good job of making sense of this in other languages. One great thing is that it includes rules for creating mutants — shades of Gamma World and to some extent, GW’s Realms of Chaos (I vaguely remember creating mutants for that game).