Super Robot Wars is a long running Japanese turn-based strategy crossover series featuring popular Mecha robots from Anime shows. In it, you can assemble your dream team from different mecha titles - be it Mazinger Z, Getter Robo, Gundam series and others(including original designs too like some Banpresto mecha and characters). You name it! All for the sake of ultimately saving the Earth from various global threats.

(Preface: No Transformers, Pacific Rim, or other mechs from the western frontier. Nothing against them, but let's be respectful of the source material.)