The PC version of Dark Souls 2 has appeared on Amazon with a May 31, 2014 release date.
The PC version on sale for $60 is an online game code that requires a Steam client to download and activate.
The Amazon page correctly lists a March 11 release date for the Xbox 360 version of Dark Souls 2, but no release date for the PlayStation 3 version, which is set to release on the same day.
It's entirely possible that the May 31 release date is inaccurate. Big publishers don't usually release high profile games on a weekends (May 31 falls on a Saturday), except for Nintendo, which has a habit of publishing games on Sundays. That the release date falls on the last day of the month is also suspicious. It's a date retailers sometimes choose when they have an idea around what time a game will be released, but not an exact date.
Previously, developer From Software said that the PC version will release shortly after the game launches on consoles.