Fans were treated to an "Uncharted 4" experience at the PS Experience last weekend, however no concrete release date for PS4 has been announced.

Naughty Dog released a 15-minute gameplay of the new installment at the event. For those who were not there to see it live, head over to this site to see the release.

As IGN reported, "In the trailer, we see Nathan Drake looking over a gorgeous shot of a jungle with a roaring sea below. Gulls fly over the rocks. His facial detail is excellent."

The environment is as unstable as ever. As Drake climbs a rock wall, it gives way and crumbles. As Drake gets to the top (he always does), a man is standing there with a weapon drawn. He says "Good to see you, little brother."

Could the antagonist in the last installment of the hit video game franchise be Drake's own brother?

Meanwhile, Sony Computer Entertainment Australia and New Zealand Managing Director Michael Ephraim played coy when asked about "Uncharted" release date for PS4.

"We don't know, that's the honest answer. We're very excited about it and I think that title will be massive. It's a very popular franchise; in fact it's our number one first-party franchise," he told Stevivor.

"Of course, Uncharted will be the highlight of the year for us though."

Rumors have been circulating that the "Uncharted 4" release date for PS4 will most likely be in the summer of 2015. However, neither official confirmation nor has an exact launch date been mentioned.

Naughty Dog and Sony meanwhile, keep their mouths shut for any rumors or hints for the upcoming Uncharted game and fans have nothing to do but keep on speculating for what they want to see and play on the upcoming game.

Stay tuned for more "Uncharted 4" release date for PS4 news here!