Celeste is part of the Pixel Pride bundle, available for 10 more days
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Pixel Pride
https://www.humblebundle.com/games/pixel-pride
Play with Pride all year long with this collection of LGBTQ+ games, including Celeste, Boyfriend Dungeon, Growing Up, and more. Pay what you want & support charity!
Part of the money goes to the Trevor Project. (By default 5% of what you pay, but you can choose how much goes to Publishers, Trevor Project, and Humble Bundle in the Adjust Donation section)