No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $6.2M — a different platform, not this one.

Kingdom: New Lands

Kingdom: New Lands - Skull Island Kingdom New Lands now brings a 6th island to explore and develop. This will present the greatest challenge never-before-seen in Kingdom, and will put your every skill to the test. Can you survive the nights and be the ruler that your people need? Tales spread of far off isles with mysteries waiting to be discovered. Rulers will need all the strength of their subjects to sail away and find new kingdoms in these New Lands. Kingdom: New Lands builds upon the award-winning gameplay and mystery of Kingdom by introducing an abundance of new content to the IGF-nominated title while maintaining the simplicity and depth that legions of monarchs have come to experience and enjoy. Travel to the New Lands and welcome the deluge of new mounts, merchants, and vagrants that call these isles home, but be wary of the new obstacles that threaten your arrival -- for not just the greedy creatures block your way but even the environment itself can defeat you. Be brave, ruler, and fight to the bitter end, lest these New Lands conquer you instead.