It is an assasin based anime that would be perfect for a game.  The system, doesn't matter, the anime had no blood, so the game would need no blood, making it very friendly to a wide audience.  The plot is not so thick you cant make a game out of it.  In fact it almost seems like a game, how the characters work toward little pieces of info, and more importantly, each ep has a specific "foe" to assaisin.  Their are even the simple guys, they all look the same and have horrible aim.  I say we get into production right away.