Complex sentence: These were rotated in and out depending on what games were to be played in a specific episode, plus potential contestants would play them in order to be paired up properly, or to establish an average score for the final round on one game.
Split into simpler sentences: These were rotated in and out depending on what games were to be played in a specific episode. In addition, potential contestants would play them in order to be paired up properly or to establish an average score for the final round on one game.