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 $1.2K — a different platform, not this one.

Spirit Valor

Overview In Spirit Valor, you play as a spirit caught in a struggle between magic and fate. After a magic outburst binds him to a human warrior Richard's body, the two embark on a perilous quest to stop the rise of demonic forces. With the world’s laws shattered, and the Overlord vanished, they must track down this elusive enemy before it is too late. Armed with the powerful Spellstones and magic, the spirit warrior sets out on an epic journey to restore balance to the world and prevent the transformation into a demon. The game offers a rich RPG experience where adventure meets strategy. Make contracts with spirits, each granting unique magical abilities to aid you in your quest. As you journey through a beautifully crafted pixel art world, you will level up your spirits, evolve them, and unlock powerful magic. The dynamic combat system allows you to absorb enemy skills using the Empty Spellstone, giving you the ability to turn your foes' strengths against them. With strategic battles, a deep magic system, and a world filled with quests and exploration, Spirit Valor delivers an engaging fantasy experience that will keep you immersed till the end. ◆ The story the one who obtained a vessel as a Warrior Magic—A mysterious power that is awakened by spirits summoned to the Human World in exchange for the transfer of mana. However, the conflict between the Warriors and the Overlord had an impact on the laws of the world. When the Warrior Richard summoned a spirit to defeat the Overlord, the magic bursted out, and the spirit was unable to return to the spirit world. If spirits remain in the Human World for too long, they will eventually turn into demons. To prevent this, Richard entrusts his body to the spirit. And so, the spirit, having found a vessel in Richard, sets out on a journey, with reliable companions and a mysterious item called an Empty Spellstone that can absorb the powers of demons. Their aim is to find the Overlord, who vanished in an outburst. ◆ Make contracts with all the spirits! By summoning a random spirit, you can use magic. In addition, you can sometimes make a contract with the spirit. A spirit you have made a contract with will lend you their power at any time. What's more, by raising the spirit's level, you can learn powerful magic, and evolve the spirit. Make contracts with all the spirits, and fight using their miraculous power. ◆ Make the skills of formidable enemies your own! By using an Empty Spellstone, that you can obtain during your adventure, you can absorb enemy skills. By reducing the enemy's stamina or inflicting an Abnormal Status effect, you can increase the absorption success rate. With a Spellstone that has absorbed a skill, you can use a skill to match the enemy! There is a limit to the number of times you can use an Empty Spellstone, but when you reach the limit, a spirit may be born, and you may be able to make a contract with it.