Unfortunately, no. Okay, I'll explain what and why. The fact is that monsters initially, according to the classics, lived on the surface... and so did the war, blah blah blah. The monsters were forced to go underground, but here’s the trick: the barrier created by people’s magic negatively affected the monsters, and it so happened that their memory was erased, that is, they don’t remember who is who, they don’t remember history. I don't think this can be made into a fan game, since it doesn't have, for example, Omega Flowey, Asriel Dreammoor, who is trying to destroy us.
