Complex sentence: Examples include "Phantasy Star Online" for the Dreamcast, in which it was possible to manufacture items offline using an Action Replay and then carry them online undetected; there was no way to determine if an item had been manufactured or legitimately won.
Split into simpler sentences: Examples include "Phantasy Star Online" for the Dreamcast, in which it was possible to manufacture items using an Action Replay in the offline mode, and then carry them over to the online mode undetectably. There was no way to determine if the item had been manufactured or legitimately won.