From the patch notes:
Handheld PC improvements:
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The game is now certified on Steam Deck and ROG Xbox Ally!
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Global improvement of text legibility
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Fixed multiple fog and lighting issues:
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Overly intense effects during the Flying Manor boss fight (which also impacted some cinematics)
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Overexposed areas in the Visages
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Overly dark areas in the Endless Tower
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Fixed FPS being capped at 30 on Steam Deck
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VSync can now be properly disabled in the settings when playing on Steam Deck
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Graphic settings are now adjusted for Steam Deck users
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Improved first-time setup flow:
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Controller input is now supported in installation wizards (no longer touchscreen-only)
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External controllers now switch seamlessly with the Steam Deck controls
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At the game awards last night the game won all but two categories it was nominated for, coming away with:
- Game of the Year
- Best Game Direction
- Best Narrative
- Best Art Direction
- Best Score and Music
- Best Performance (for actress Jennifer English as Maelle)
- Best Independent Game
- Best Debut Indie Game
- Best Role Playing Game (RPG)



Didn’t test the latest patch, but previously I was able to run it 1080p lowest settings. Played fine but didn’t look great obviously.
Didn’t try handheld mode, so maybe it looks fine on the deck screen