According to ESRB, this game contains: Fantasy Violence
Parents shouldn't have any concerns about the content in The Falsebound Kingdom. Yu-Gi-Oh! is a game aimed at kids who're slightly older than the Pokémon crowd and even has a cartoon of its own. What should concern parents is the fact that the game isn't exactly user-friendly. The manual is rarely helpful, and the lack of an in-game tutorial only compounds the problem. It's really not a "pick-up-and-play" experience.
Yu-Gi-Oh! fans will probably enjoy seeing a new adventure for their favorite characters, but when they find out the game is a pseudo-strategy RPG, they're likely to be disappointed. Those looking for the series' traditional card battling will want to look elsewhere.
Casual gamers can safely skip this one. If you're interested in Yu-Gi-Oh!, you might want to give it a rent (although you'd be better served by playing one of the card game based titles), but if you don't know a Yugi from a Pikachu, then you're not going to have much interest in seeing this one through to the end.
Deaf and Hard of Hearing gamers can pick this title up without fear—there's text everywhere, just like the old days before the advent of voice acting.