After several minor teasers over the years, game developer Naughty Dog finally unveiled the full gameplay trailer for its action-packed third-person shooter game titled "Uncharted 4: A Thief's End" during Saturday's PlayStation Experience held in Las Vegas, Nevada. 

The 15-minute gameplay video starts with character Nathan Drake standing over the edge of a cliff at the border of a jungle. The game's protagonist is also heard asking someone "Where the hell are you?" at the start of the video, but the information about who he is addressing is only revealed during the end of the trailer. 

Drake is also seen entering a very dark cave, which is only illuminated by his sole flashlight. The game's protagonist also climbs behind waterfalls as well as slimy rocks before exiting a breathtaking cave that is mostly covered with thick foliage and moss. 

"Uncharted 4: A Thief's End" is the successor of the 2011 game "Uncharted 3: Drake's Deception." It follows Drake's journey as a fortune hunter as he goes on a long journey to find out the truth about the historical conspiracy that surrounds a legendary pirate treasure. 

The gameplay video teaser also shows the game's sole hero taking down enemies as he traverses through caves and jungles. He faces several foes who challenge him to man-to-man combat, but he succeeds in all of the battles while continuously moving from one destination to the other. 

At the end of the video, Drake faces an unexpected enemy, who could also be the same person who he was looking for at the start of the trailer. After a very long journey, a lone man greets him with a weapon pointing at him. 

The man says, "Good to see you, little brother."

The man, who is obviously is Drake's older brother, is voiced by "The Last of Us" voice actor Troy Baker. He confirmed the news through his Twitter account, saying that he indeed portrays the role.

Meanwhile, Nolan North comes back to reprise his role as Nathan Drake in the fourth installment of the "Uncharted" series.

"Uncharted 4" will be released by Sony Computer Entertainment sometime in 2015.