Phosphor Games and Zynga have released Horn Free, a complimentary version of its 3D action-adventure mobile game that allows players to explore the "Prologue" section.
Players can challenge an unlimited series of Titans in a new Quest mode (also available for the premium app under Challenge mode) and unlock customizable weapons and armor.
The latest update also optimizes both versions of the game for iPad Mini and the new iPad.
As of right now, you can only play Horn on Android.
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[Joystiq]