From Humble bundle it should be region locked and activation available for

Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Republic of Moldova, Russian Federation, Tajikistan, Turkmenistan, Uzbekistan, Ukraine, Latvia, Lithuania, Estonia, Austria, Belgium, Bulgaria, Cyprus, Czechia, Denmark, United Kingdom of Great Britain and Northern Ireland, Finland, France, Germany, South Georgia and the South Sandwich Islands, Greece, Hungary, Iceland, Ireland, Isle of Man, Italy, Jersey, Liechtenstein, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden

https://steamdb.info/sub/25994/

please double check if you're eligible in case i made a mistake.