Complex sentence: Furthermore, the stories of the games have been slotted into the continuity of the Buffyverse as many of the actors who portrayed characters on "Buffy the Vampire Slayer" took part in the voice-overs for the games.
Split into simpler sentences: Furthermore, the stories of the games have been slotted into the continuity of the Buffyverse. Many of the actors who portray characters on "Buffy the Vampire Slayer" took part in the voice-overs for the games.