Ironhide Game Studio today released the Shadowmoon Halloween update for Kingdom Rush: Frontiers, with brand new free content for iOS devices. An endless night is upon us! The dead rise from their graves and mindless horrors prowl the land! In this hair-raising update, you’ll face nine new enemy types in three brand new stages. To keep the undead at bay, upgrade towers to fend off werewolves, ghosts, and vampires. Enlist the help of two new heroes including Dante the Vampire Slayer and Bonehart the undead skeletal dragon! Developer Ironhide also announced a limited-time discount on both versions of the game, as well as a sale on all heroes. Get it now on iPhone and iPod Touch for $0.99 (originally $2.99) or on iPad for $2.99 (originally $4.99).