Lets make it simple.. Anime, makes that skills of tags and whatever for the purpose of entertaining its audience, adding more action and dramas which is not controlled by the viewers. Game, makes the skill and effects of the skills based on the balance of each ninjas because Game is also mode or type of entertainment but it is controlled by the one who is playing it, so tactics and formations is a strategy and logic for battling others.. That's why please, dont overcomparing Anime and Games :D (overcomparing, is that word exist? sorry for my bad english, hahahaha xD)