Naughty Dog has unveiled the first trailer for "Uncharted 4: A Thief's End" during this year's E3 conference.

The gaming studio didn't offer an official release date for the next "Uncharted" installment, but the title is expected to hit store shelves in 2015. Check out the trailer and the official synopsis below:

"Several years after his last adventure, retired fortune hunter, Nathan Drake, is forced back into the world of thieves. With the stakes much more personal, Drake embarks on a globe-trotting journey in pursuit of a historical conspiracy behind a fabled pirate treasure. His greatest adventure will test his physical limits, his resolve, and ultimately what he's willing to sacrifice to save the ones he loves."

Ubisoft also released a trailer for one of the next installment of the "Assassin's Creed" franchise. "Assassin's Creed: Unity" premiered their first gameplay footage for single player and four-player co-op mode. The title was specifically developed for next-gen consoles, according to Ubisoft's official blog.

"Because of these new-gen consoles, this is the first time that we can fundamentally change a lot of the core mechanics and a lot of the stuff under the hood in terms of engine, game mechanics and actual game structure," Creative Director Alex Amancio told Ubisoft. "So this is what Unity is. It's not a reboot. It is a reinvention of Assassin's Creed for this next generation."

However, Ubisoft didn't dish any details regarding what is going on in the Modern Day storyline. In "Assassin's Creed IV: Black Flag", gamers played as an Abstergo employee.

"It's very different than anything you've seen in any of the past games," Amancio said. "Black Flag was different. This is more different."

"Assassin's Creed: Unity" will be released on Oct. 28 to the Xbox One, PlayStation 4 and PC. Check out the official AC trailer in the video below.