Gantz is one of the few 18-rated anime movies that you can easily pick up in the UK. As well as the anime it’s also a successful manga series. It centres around Kei Kurono after he dies in a train crash. Kurono is brought back to take part in “The Game” along with other people who have appeared to die.
The Game is bloody and violent – the reason why the anime carries the 18 rating in the UK – and the cast of characters frequently changes as many dies. The Game tends to involve missions against aliens that turn brutal and deadly.