[Humble Bundle] Summer Sale Missions
Collect 1 stamp and receive a 10% discount coupon for Humble Monthly!
Collect 2 stamps and receive a 15% discount coupon for Phantom Doctrine!
Collect 3 stamps and receive Braveland for FREE!
Collect 5 stamps and receive The Ship: Murder Party for FREE!
You can find the stamp here: https://www.humblebundle.com/store