Games like once in hell
Games like once in hell include MiSide, Firewatch, What Remains of Edith Finch, Portal 2, and Layers of Fear (2016). We matched them by the tags players give once in hell on Steam (Adventure, Psychological Horror, Arcade, Story Rich, and Hidden Object): closest matches first, and among equally close ones the better-known games.
MiSide
Shared: Psychological Horror · Story Rich · First-Person
Firewatch
Shared: Adventure · Story Rich · First-Person
What Remains of Edith Finch
Shared: Story Rich · Adventure · First-Person
Portal 2
Shared: Singleplayer · Story Rich · First-Person
Layers of Fear (2016)
Shared: Psychological Horror · Adventure · First-Person
Little Nightmares II
Shared: Adventure · Psychological Horror · Singleplayer
Red Dead Redemption 2
Shared: Story Rich · Adventure · Singleplayer
The Beast Inside
Shared: Adventure · First-Person · Psychological Horror
Kingdom Come: Deliverance II
Shared: Story Rich · Adventure · Singleplayer
SOMA
Shared: Psychological Horror · Story Rich · First-Person
BioShock Infinite
Shared: First-Person · Adventure · Story Rich
Fran Bow
Shared: Psychological Horror · Story Rich · Adventure
Dark Deception
Shared: Psychological Horror · First-Person · Singleplayer
Fallout 4
Shared: Adventure · Singleplayer · Story Rich
Superliminal
Shared: First-Person · Story Rich · Singleplayer
Sally Face - Episode One
Shared: Psychological Horror · Story Rich · Adventure
Sultan's Game
Shared: Story Rich · Adventure · Singleplayer
Outlast
Shared: Psychological Horror · First-Person · Adventure
Outcore: Desktop Adventure
Shared: Psychological Horror · Adventure · Story Rich
Outlast 2
Shared: Psychological Horror · First-Person · Singleplayer
Still Wakes the Deep
Shared: Psychological Horror · First-Person · Story Rich
Half-Life 2
Shared: Story Rich · Adventure · Singleplayer
Fallout: New Vegas
Shared: Story Rich · Singleplayer · Adventure
Poppy Playtime
Shared: Singleplayer · Psychological Horror · First-Person