Posted January 07, 2019 by HappyHand
You will receive the key when you click the Get Steam Key button on your purchase page. Here are further instructions:
https://itch.io/t/67604/how-to-get-a-steam-key-from-your-itchio-purchase
You can use the Steam Key in Steam by:
Launching the Steam client > Choosing Games at the top > Clicking Activate a Product on Steam... and inserting the key code there.
Feel free to ask any questions and I hope you have fun playing Niplheim's Hunter!