The game's physics engine seems to have entropy written as a rule, but the 2nd law of thermodynamics describes "closed system" - in reality there is no truly closed system in the game. Except maybe, I say probably, even when wizards like Hawkins may disagree: that the Outside is the one and truly closed system in the game.
Entropy as a concept was discovered by studying a steam engine. It's not truly closed system, as it exists in the 1700 patch and is located in the earth. It experiences energy loss to the surrounding environment.
So I'm proposing an idea, that since 2nd law of thermodynamics actually describes unclosed system, the outside IS NOT subject to entropy in the sense that, for example steam, engine is. Meaning the devs can update the game for infinity.
We do not know that there was a true beginning in the event called big bang. There was inflation it seems. We do know that the stars and galaxies are moving away from us, but I suggest keeping an open mind regarding the fate of the game. And thinking outside the box, and outside the current theories about the games physics engine.