Mine was Warlocks, if anyone remembers that, it wasn't that popular but it was really, really fun.
I also liked the footmen frenzys, tower defenses (GEM TD was the best), malls (or was it mauls? i cant remember).
Tower Defenses, Arenas(Angel and the like), Castle Wars.... Hero Line Wars. My God, I played the **** out of HLW.
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