Steam has Sky: Children of the Light (PC Digital Download) for Free.

Note: This Early Access game is still in development and may or may not have some changes in the future. The game will remain in Early Access until player feedback and refinements can be fully implemented. More can be found in the description on the product page.

About this game:

• Regain your child-like sense of wonder in this social adventure game.
• The Realms of Sky need the Light within you to heal the world of Darkness. Keep watch for the Spirits of your Ancestors. Some of them are stuck here—and they need your help. You have the power to free them, and return them to their home among the stars.
• Explore an open world: A wholesome, cozy Kingdom filled with adventure and delight. The perfect place to hang out with friends—or a daily escape for those who prefer to relax and unwind on their own.
• Embark on quests, solve puzzles, and explore the ruins of an ancient civilization. Take flight, make friends, and undergo trials to defeat the Darkness. Play music, attend concerts, and throw parties in your in-game home.
• A kind, inclusive community is ready to welcome you and your loved ones. Express your personal style with an ever-expanding catalog of cosmetics; connect with other players through charming, beautifully-animated emotes. In Sky, you are welcome and encouraged to be whoever you are.
• A Social MMO: Make sure to look out for other Sky Children! Some of them are new, like you, but many have been here for quite some time—and they love to guide new arrivals as yourself.