Complex sentence: As architect and research head for RedOctane, he was a key contributor to the original Guitar Hero game, and designed the electronics for Guitar Hero II and the Guitar Hero drum controller, which formed the basis for all subsequent Guitar Hero versions.
Split into simpler sentences: As architect and research head for RedOctane, he was a key contributor to the Guitar Hero game series. He designed the electronics for Guitar Hero II and the Guitar Hero drum controller, which formed the basis for all subsequent Guitar Hero versions.