Subscribe to the Humble Bundle newsletter and we'll email your free game to you. Hurry, this offer is available only while supplies last, or until June 14, 2021 at 10:00:00 AM PDT! + The redemption deadline is June 18, 2021, 10:00:00 AM PDT. You have 6 days left! 
https://www.humblebundle.com/store/surviving-mars-deluxe-edition-free-game