Sheikh abdulaziz السلام عليكم , sheikh is it a must for a repentence from haram games to be correct is to delete saved data ? Even if i could do it easily? Is it a must?

No, deleting the saved data is not a condition of your repentance, the conditions are that you stop, that you regret it, and that you resolve not to return. If the game itself is unlawful to keep and cannot be used in any permitted way then get rid of it, and do not dig further than that.