Back in January 2012, when Thunder Moon was still called Squad Miner, client-server networking was already working. While this game has gone through a lot of design changes before it finally hit the marketplace, having multiplayer has always been part of the plan and remains part of the core tech within the engine.
The networking code is still in there just waiting to be turned on. Unfortunately, before MP will be available to the players, I will need to take care of a wide variety of things in order for it to work well. First, all of the mid level code to sync objects between peers. Then the UI. The Lobby. Testing. And more testing. Despite having a head start on this task, it will be a big one. I hope to get working on MP in the near future, but there are more pressing issues that need to be taken care of in the first two updates.
Thanks everyone for your support of the game so far and please let me know what you think is important for Thunder Moon going forward. I'll do my best to listen to everyone and make the game as good as it can be.