Batman: Arkham City Lockdown is an action-adventure video game developed by NetherRealm Studios and published by Warner Bros. Interactive Entertainment for iOS and Android. The game is part of the Batman: Arkham series, and was released on December 7, 2011 for iOS and June 26, 2013 for Android. Taking place before Batman: Arkham City, the game sees players using touchscreen controls to fight enemies one-on-one, including villains such as Two-Face, Solomon Grundy, the Joker and Deathstroke. Defeating enemies earns points that can be used to upgrade Batman's stats or unlock gadgets or costumes. The game features integration with Game Center.