Games like Necrophosis
Games like Necrophosis include The Exit 8, Layers of Fear (2016), What Remains of Edith Finch, Still Wakes the Deep, and Amnesia: A Machine For Pigs. We matched them by the tags players give Necrophosis on Steam (Lovecraftian, Surreal, Walking Simulator, Psychological Horror, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Walking Simulator · Exploration · Psychological Horror

Layers of Fear (2016)
Shared: Psychological Horror · Walking Simulator · Horror

What Remains of Edith Finch
Shared: Walking Simulator · Mystery · Exploration

Still Wakes the Deep
Shared: Lovecraftian · Psychological Horror · Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Psychological Horror

SOMA
Shared: Psychological Horror · Horror · Lovecraftian

Garten of Banban
Shared: Psychological Horror · Horror · Puzzle

Eclipsium
Shared: Surreal · Walking Simulator · Psychological Horror

No one lives under the lighthouse Director's cut
Shared: Lovecraftian · Horror · Psychological Horror

Poppy Playtime
Shared: Horror · Psychological Horror · Puzzle

The Room 4: Old Sins
Shared: Lovecraftian · Mystery · Puzzle

DREDGE
Shared: Lovecraftian · Exploration · Mystery

Inside the Backrooms
Shared: Horror · Psychological Horror · Puzzle

Amnesia: The Dark Descent
Shared: Psychological Horror · Horror · Lovecraftian

Firewatch
Shared: Walking Simulator · Mystery · Exploration

Psalm 5:9-13
Shared: Psychological Horror · Walking Simulator · Horror

Dreamcore
Shared: Walking Simulator · Psychological Horror · Surreal

Call of Cthulhu®
Shared: Lovecraftian · Psychological Horror · Horror

Escape the Backrooms
Shared: Psychological Horror · Horror · Exploration

The Room Two
Shared: Mystery · Puzzle · Lovecraftian

Mouthwashing
Shared: Psychological Horror · Horror · Walking Simulator

Garten of Banban 2
Shared: Horror · Psychological Horror · Puzzle

Endacopia
Shared: Psychological Horror · Surreal · Horror

Outer Wilds
Shared: Mystery · Exploration · Puzzle