'Uncharted: Fortune Hunter' has been released for free on Google Play and Apple App Store a week ahead of 'Uncharted 4: A Thief's End'. Each level places you on a different grid-based puzzle environment that is littered with lethal hazards and tasks that you need to navigate past so that you reach an endpoint in as few moves as possible and collect a key which is needed to open up a treasure chest of loot. Although it is a fun game by itself the main draw for Uncharted fans is going to be the multiplayer perks for the PS4 game that the mobile game doles out as rewards.