

They patented a very specific algorithm for a very specific kind of game. You can still do knock-offs of the system in the same way you can make RTS games without asking Blizzard’s permission or platformers without asking Nintendo’s.
I would suspect that SoM’s system is complex enough that nobody’s been eager to try and replicate it. But they high level concept of randomized enemy generation isn’t something you can patent. Neither is randomizing story elements between NPCs.









But it’s just vanilla combats with predictable outcomes.
So they invented… the first dozen seasons of the Pokemon cartoon?