Batman: The Animated Series Adventures Arkham Asylum adds 10 new villains: Including Clayface, Poison Ivy, The Ventriloquist, Killer Croc and Baby Doll! You will also get 13 more missions to play through. In addition, Arkham Asylum adds an all-new game mode: Clayface Mode! Adding a hidden traitor mode where one hero is actually Clayface in disguise, able to reveal their true identity at any time.