Depends on the rpg Alonexp for example provides a cheat early in game if you wish to use it maxing everything out and you can sail through the game others do not .Or you could try cheat engine be aware though it is fiddly if memory serves me correct your values are 2x +1 so for example if you are looking for value of 100 you would need to search 201.
Or you could just enjoy the game the way it is meant to be played