Uncharted 4: A Thief's End is finally about to go official in a few days' time, but in the meantime, gamers who can't wait any longer can keep the urges at bay with Uncharted: Fortune Hunter on Android and iOS.

The mobile puzzle game is a free-to-play app that sets Nathan Drake on various grid-based stages and features the Naughty Dog hero's old mentor Victor "Sully" Sullivan.

It pretty much took cues from games such as Lara Croft GO and Hitman GO, where players need to reach the endpoint of a level in as few moves as they can while steering clear of various dangers sprinkled here and there, including but not limited to dart traps.

Now, the puzzles are divided into six categories, and there are more than 200 brainteasers to solve. That means Uncharted: Fortune Hunter can provide hours of gameplay to keep fans busy until the PS4 title hits digital storefronts.

Moving on to the bonus Uncharted 4: A Thief's End multiplayer rewards, the unlockable items range from skins, one-time-use boosters and Relics, the in-game currency that can be spent on either a DLC Vanity Chest or a DLC Gameplay Chest.

To earn the boosters and Relics, players will have to open up Sully's loot crates, and to collect those, they will have to wait for it to become available on a timed basis or unlock them with keys that can be acquired by solving puzzles with as few moves as possible.

Meanwhile, users can amass the costumes simply by reaching certain levels or finding treasures.

Take note that linking a PlayStation Network account to a live Uncharted 4: A Thief's End save file is required to get ahold of the rewards on the console, but that function won't be up until the PS4 title itself becomes available.

As for the release dates, Uncharted 4: A Thief's End is going to roll out on May 10, while Uncharted: Fortune Hunter is already available via the Play Store and App Store.