Hi there, we haven't mentioned yet that this will ever be on steam, but we were thinking about this option. Currently the game is in very early stage so it won't be added anytime soon. If I were to guess i would say at the start of 2020, but there are a lot of factors that need to be taken into consideration.
Firstly, there are only two of us working on this game and the scope is already pretty huge which makes it a lot more difficult to handle. Secondly, the project is not yet profitable so we had to find other revenue streams just to be able to pay our bills and put food on the table, which directs a lot of our time from the project. Furthermore, as I mentioned this game doesn't have much to offer as we are finishing our main foundation that we could expand on.
All in all, only time will tell how much the game is progressing with each update and when there is enough content we will consider adding it to steam. Hopefully, that makes sense.
Cheers.