Copies of Uncharted 4 have already made it out into the wild, according to users on the Uncharted subreddit. Nathan Drake’s next foray into tomb raiding is still set for release on May 10, but some users have really lucked out.
According to thisgengaming, some games have been shipped from Amazon and have already started arriving at player’s homes. The game was originally scheduled to release April 26, so this is most likely just a major misstep on Amazon's part.
Some UK retailers also seem to be selling Uncharted 4 weeks ahead of its release. According to Videogamer.com, a man was able to buy a copy from CEX that happened to be sitting behind the counter when he went into buy a camera lens. The game was playable and in a “heavy firefight it wasn't too bad with framerates." The Multiplayer is still unplayable, since that won’t get turned on until the game’s official release.
In the meantime, be wary of spoilers on the internet if you weren’t one of the lucky few to get your hands on an early copy of Uncharted 4.