The game is available and it costs 19.99$, there should be a Buy Now section at the top & bottom of the product page which you can use to buy the game, here's the product page:
https://happyhand.itch.io/niplheim
Here's the purchase page in case the Buy Now link/section isn't displaying for you for some reason:
Oh you meant Steam, currently I have no idea when the game will be available on Steam. It could be next month or next decade, I will make an announcement in Steam when I know for sure. The price will be the same as in itch.io, 19.99$ and the first week will have have a 30% off launch discount making the game cost 13.99$ during that time. Sorry I didn't realize you meant Steam the first time!
