Square Enix describes the game:
The rules to this mysterious dungeon are simple… every time you enter, the world around you changes shape, but it only moves whenever Chocobo moves, whether Chocobo walks, kicks, or uses an item.
Fight monsters alongside your buddies and adventure through countless dungeons, all whilst enjoying a deep and engaging story, it even includes 2-player co-op play!
Square Enix previously revealed the game with a release period of winter 2018. The game is a "return" to the 2007 game Final Fantasy Fables: Chocobo's Dungeon.
Source: PlayStation's YouTube channel