Can you be more specific with your question? Because in the general sense, Dynasty Warriors is not historically accurate at all. It is a hack-and-slash game that is loosely based on the historical fiction "Romance of the Three Kingdoms", which is loosely based on historical events. I haven't played the latest games from the franchise, but I would expect only The names of the (male) characters and locations to be accurate.

If you wish for historically accurate information regarding the Three Kingdoms period, then the "Sanguozhi" is the best source to consult.