Korea's Game Rating Board (via Joystiq) has issued two new rating for a PlayStation 4 and PlayStation Vita version of the once PlayStation 3 exclusive title The Unfinished Swan, suggesting it could be aiming for a cross-platform release.

Currently available exclusively for the PlayStation 3, The Unfinished Swan is a (mostly) monochromatic adventure game in which players splatter their solid-white surroundings with black paint in order to reveal environmental clues and hidden passages.

AusGamers awarded the game a solid 8 out of 10 in our review, noting that "The Unfinished Swan is entirely satisfied with being extremely interesting and lovely, rather than being the sort of larger, more crucial experience it occasionally seems like it might turn into."

Publisher Sony nor developer Giant Sparrow has yet commented on the new ratings, though we can probably expect the news at this year's GamesCom starting early August.