Complex sentence: Rouge does find many of emeralds during the game after breaking into "Security Hall" and stealing them, however she is revealed by Shadow the Hedgehog to be a Secret Agent and stops Rouge from taking the emeralds from the Eclipse Cannon.
Split into simpler sentences: Rouge does find many emeralds during the game after breaking into "Security Hall" and stealing them. However, she is revealed by Shadow the Hedgehog to be a Secret Agent and stops Rouge from taking the emeralds from the Eclipse Cannon.