Complex sentence: In Wily Tower, Mega Man travels through three different stages fighting against a trio of new bosses called the Mega World Corps (the Genesis Unit in the American version), which after being defeated, the player finally faces Wily in the titular tower.
Split into simpler sentences: In Wily Tower, Mega Man travels through three different stages fighting against a trio of new bosses called the Mega World Corps (the Genesis Unit in the American version). After they are defeated, the player finally faces Wily in the titular tower.