Yeah I guess there are some phenomenons that I haven’t considered. But are they really strong enough to stop the game?
I have already excluded that frame-dragging/emission of gravitational waves stops the game, because the emission of gravitational waves reduces the energy from the system, but the effect is stronger if objects are closer by. when the distance between them is larger, gravitational waves become negligible. hubble expansion, on the other hand, becomes stronger on larger scales. so at some point, it’s larger than the loss due to gravitational waves.
explain entropy though, where’s thermodynamics in the game?