Games like Floor 0
Games like Floor 0 include The Cabin Factory, Platform 8, The Exit 8, HELLMART, and Firewatch. We matched them by the tags players give Floor 0 on Steam (Horror, Hidden Object, Immersive Sim, Choices Matter, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

The Cabin Factory
Shared: Horror · Choices Matter · Immersive Sim

Platform 8
Shared: Walking Simulator · Hidden Object · Adventure

The Exit 8
Shared: Horror · Immersive Sim · Walking Simulator

HELLMART
Shared: Horror · Simulation · Choices Matter

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

Who's at the door?
Shared: Horror · Simulation · Immersive Sim

Killer Frequency
Shared: Horror · Adventure · Simulation

Amenti
Shared: Horror · Adventure · Walking Simulator

Summon
Shared: Horror · Simulation · Choices Matter

Scanner Sombre
Shared: Horror · Walking Simulator · Exploration

Zoochosis
Shared: Horror · Realistic · Simulation

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

[Chillas Art] Shinkansen 0 0
Shared: Horror · Choices Matter · Immersive Sim

Visage
Shared: Horror · Adventure · Walking Simulator

[Chillas Art] Parasocial
Shared: Horror · Choices Matter · Immersive Sim

No, I'm not a Human
Shared: Horror · Choices Matter · Indie

CARIMARA: Beneath the forlorn limbs
Shared: Horror · Adventure · Exploration

The Forest
Shared: Horror · Adventure · Exploration

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

Little Nightmares
Shared: Horror · Adventure · Atmospheric

Obey the Voice™
Shared: Horror · Adventure · Walking Simulator

The Complex: Expedition
Shared: Horror · Exploration · Realistic

SOMA
Shared: Horror · Exploration · Atmospheric

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