Complex sentence: He is famous for being the creator of various gameplay systems used in the "Final Fantasy" series such as Active Time Battle (ATB), Ability Points (AP), Active Time Event (ATE), Active Dimension Battle (ADB) and Gambits.
Split into simpler sentences: He is famous for being the creator of various gameplay systems used in the "Final Fantasy" series. Examples of his work are the Active Time Battle (ATB), Ability Points (AP), Active Time Event (ATE), Active Dimension Battle (ADB) and Gambits.