Check out the Halloween Horror Collection Humble Bundle

Some spooky treats available in the Halloween Horror Collection Humble Bundle, if you can handle it that is. You're not a scaredy-cat right?

Making it easy for you I'll go through and individually list the expected compatibility on Steam Deck and Linux desktop, along with any ProtonDB rating and noting any Native Linux versions available.

Steam Deck Verified

Little Nightmares (ProtonDB Platinum)
+ Little Nightmares - Secrets of The Maw Expansion Pass

Little Nightmares II Deluxe Edition (ProtonDB Platinum)

The Dark Pictures Anthology: The Devil in Me (ProtonDB Platinum)

Steam Deck Playable

The Dark Pictures Anthology: House of Ashes (ProtonDB Platinum)

Steam Deck Unsupported

The Dark Pictures Anthology: Little Hope (ProtonDB Platinum)

The Dark Pictures Anthology: Man of Medan (ProtonDB Gold)

Both above do actually work but you may need GE-Proton to get the best experience.

Check out the Humble Bundle to purchase.