Unlike Walking Dead, its because it uses the original music, the original sound effects and most important the original actors voices.
Shame on you Stern for crippling Walking Dead. If you couldn't secure the license for that stuff, then you should have made the machine based on the comics.
Walking Dead is one of the most popular tv shows on right now. That machine should have sold like hot cakes.
Its my understanding the Paramount handed them all of the sound effects and voices that they could ever use for Star Trek. Great game.