No, I’m not working alone in the project. I did the base human models, armors, landscape, animations (the hand made ones) and the code. Other persons have contributed with weapons models, houses, and now there are only one modeler doing houses and map assets. Also some assets were purchased from online stores.
I think that Steam early access is a good option, but I don’t see how publish a game with a main quest. Games like the Coldscooter one are perfect to early access, because the players can play while the game is updated regulary. There isn’t a main quest, only survive.