What game engine and stack did you use to finish this? It's very well done, how big is your team and how long did it take to get to beta?
Our "team" is tiny, it's just two of us. We've been working on it past 6 years as a hobby project over the weekends. Last year we decided to quit our tech jobs and focus on this full-time. We work with freelancers who do 3D art and music for us.