Best Buy has Batman: Arkham Knight for Xbox One for $19.99. Shipping is free on orders of $35 or more, or choose in-store pickup. Note, the game is available for $15.99 for Best Buy's Gamers Club Unlocked members. The game sells for $33.77 at Walmart. Also available is Mortal Kombat X for Xbox One for $19.99, or $15.99 for GCU members.