Complex sentence: The game is a spinoff from Naughty Dog's "Jak and Daxter" series, though reference is made to the previous games, and it is considered to be part of the main series.
Split into simpler sentences: The game is a spinoff from Naughty Dog's "Jak and Daxter" series, though reference is made to the previous games. It Is a spinoff but many people consider it to be part of the main series.