From Humble Bundle's May 2020 Humble Choice bundle

Region locked. Recipients may not be able to activate the key if they come from Armenia, Azerbaijan, Brunei, Brazil, Belarus, China, Georgia, Hong Kong, Indonesia, India, Kyrgyzstan, Cambodia, Kazakhstan, Laos, Sri Lanka, Moldova, Macau, Malaysia, Philippines, Russia, Singapore, Thailand, Takijistan, Turkmenistan, Taiwan, Ukraine, Uzbekistan, Vietnam