Complex sentence: One of Nintendo's policies was that its third-party licensees could not release any video game on competing consoles and the resultant lack of third-party support left the Master System deprived of many arcade and NES hit titles.
Split into simpler sentences: One of Nintendo's policies was that its third-party licensees could not release any video game on competing consoles. The lack of third-party support left the Master System deprived of many arcade and NES hit titles.