Humble Bundle has their spring sale.
In addition: "Collect a stamp for every $5 you spend on the Humble Store or each daily visit to the Store Home Page!
You have until May 17th at 10AM PDT to collect your stamps and claim your prizes at which point the next week of rewards will begin."
Collect 1 stamp and receive a 7% discount coupon on Frostpunk and a 10% discount coupon on Humble Monthly!
Collect 3 stamps and receive Millennium: A New Hope for FREE!
Collect 5 stamps and receive Whispering Wilows for FREE!
Also grab Flame in the Flood for free right now from humble bundle: [link to previous SD post] https://slickdeals.net/f/11579667-the-flame-in-the-flood-pc-digital-download-free-humble-bundle?v=1&src=SiteSearch