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Gladiator Toy Robot Mech Builder 3D is a robot building and customization game where users battle their custom robots against AI gladiator opponents. The game is free to play though it does contain in app purchases.
Roblade:Design&Fight is a robot building game where users assemble custom robots to then fight in an arena. The game is free to play and includes in app purchases that range from $0.99 - $19.99 per item.