The most hardcore White Knight Chronicles II player has been found. A user amassed a whopping 8701 hours playing Level-5’s RPG. That breaks down to 362 and a half days without sleep playing the PlayStation 3 RPG. The result is a max level character and the highest guild rank. Although, I imagine the player fulfilled both of those goals *several* thousand hours ago.
White Knight Chronicles II was released in Japan on July 8, 2010, which means the game has been out 516 days (517 if you count today). If this player got the game at launch he or she spent almost 17 hours (16 hours 49 minutes) each day logged into White Knight Chronicles II.