Parallel Kingdom is a location based MMORPG that is free to play and includes in app purchases that range from $2.99 - $114.99 per item.
Con Pay to win
After having spent a few hours in game the balance of food earned does not match what is required to level up at a worthwhile pace. The game is unfairly balanced in order to force the player to spend real world money on a secondary currency. So those that have funds to waste on the game will advance quickly while those that do not will be left to pretty much languish.