There's a lot of complexity to multiplayer, but there's also a lot of existing open source solutions... And the game has already attracted a lot of attention from some REALLY smart people, who are currently busy dissecting it. Its entirely possible, but it might take a long time and attention from the right set of nerds. What I'm wondering is if, due to the enigmatic nature of the developer... is if there isn't already multiplayer IN the game, just that nobody has figured it out yet. Everyone's still twerked over the portals and nobody has opened one yet. They could be where the developer intends to add multiplayer later, or they could just be waiting tight lipped and snickering until we figure it out. Who knows lol Regardless, after seeing all the amazing things done by the modding community, I don't think anything is truly impossible for them to do, in time.