Coolly combining the mechanized world of Japanese mecha with their whimsical building block design, LEGO created Exo-Force. The series had a good two year run, releasing a variety of robot kits and their adorable human pilots. I particularly liked the minifigures, each unique with their own bright color scheme, spiky hair style and adjustable facial expressions (serene to anime angry!) It's a shame an Exo-Force LEGO game was never released, it would have been a riot.