I'd like to be able to add modifications to the best games / content that I return to over and over again. Now that I'm older and have money, for some of them I

I'd like to be able to add modifications to the best games / content that I return to over and over again. Now that I'm older and have money, for some of them I might be willing to pay 10 times just to be able to have it more open to modding. For a tiny minority maybe even 100+ times, if I ever get to be rich enough to retire early and still want to retro-game all day. It satisfies the desire to play an enjoyable game and the desire to tinker.