Games like Please Duology
Games like Please Duology include SOMA, What Remains of Edith Finch, Firewatch, Outer Wilds, and Poppy Playtime. We matched them by the tags players give Please Duology on Steam (Adventure, Exploration, First-Person, Lovecraftian, and Atmospheric): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Atmospheric · Psychological Horror · Horror

What Remains of Edith Finch
Shared: Atmospheric · First-Person · Exploration

Firewatch
Shared: Adventure · Atmospheric · First-Person

Outer Wilds
Shared: Exploration · Adventure · Mystery

Poppy Playtime
Shared: First-Person · Horror · Psychological Horror

Amnesia: A Machine For Pigs
Shared: First-Person · Horror · Atmospheric

Layers of Fear (2016)
Shared: First-Person · Atmospheric · Psychological Horror

DREDGE
Shared: Exploration · Adventure · Lovecraftian

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

Still Wakes the Deep
Shared: Lovecraftian · First-Person · Psychological Horror

No one lives under the lighthouse Director's cut
Shared: Adventure · Lovecraftian · Atmospheric

Dagon: by H. P. Lovecraft
Shared: Lovecraftian · First-Person · Atmospheric

The Room Two
Shared: Adventure · Atmospheric · Mystery

Inside the Backrooms
Shared: Horror · Adventure · Psychological Horror

Sally Face - Episode One
Shared: Psychological Horror · Adventure · Horror

Outlast
Shared: First-Person · Horror · Atmospheric

Lethal Company
Shared: First-Person · Exploration · Horror

Amnesia: Rebirth
Shared: First-Person · Adventure · Exploration

The Room Three
Shared: Adventure · Mystery · Atmospheric

Little Nightmares II
Shared: Adventure · Horror · Atmospheric

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

Little Nightmares
Shared: Adventure · Atmospheric · Horror

Mouthwashing
Shared: Psychological Horror · Atmospheric · Horror

Scorn
Shared: Atmospheric · First-Person · Horror