Poke is a cheat utility that is offered for free for Windows games. It basically scans memory so that you can look in your saved game for your “money/health/experience” or whatever else that is dynamic. If it’s a unique number, you can probably edit that number to cheat in the single player game(s).
This definitely helps via the role playing type games, but should work with any game that stores saved points in memory (pretty much all games).
Via Codefromthe70s