[seaish]

Those aren't very good examples. They're way different and I don't think anyone is claiming satisfactory is infringing anything.

I would go to OpenRCT2, which specifically has you copy over the graphics from a genuine copy of RollerCoaster Tycoon 2, and OpenTTD, which includes new graphics in place of the ones from Transport Tycoon Deluxe. However, no one actually knows if this is enough of a difference to matter. It's more about convincing the original creator to ignore it than actually being legally robust.

And then for non-game software we have Java in Android.