https://www.indiegala.com/store

Steps:

● Click on the link
● Scroll down
● Type your email
● Check your email
● Click on the link that they gave you
● Click on Bundles library
● Click on Indiegala Giveaways
● Choose Space Hack
● Click where is saying Steam
● Copy the code and put it in Steam

For those who can't figure out how to activate Key/code you got on steam, here are the steps:
● Click "+ Add A Game..." near the bottom left corner of steam window.
● Then click "Activate a product on steam"
● Then click "Next" then "I Agree"
● Then paste the "Key/Code" in the Product Code box & click "Next"
● Have fun