Games like Floodlight
Games like Floodlight include Subliminal, Little Nightmares, DreadOut, The Medium, and Hellblade: Senua's Sacrifice. We matched them by the tags players give Floodlight on Steam (Adventure, 3D, Realistic, Third Person, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Subliminal
Shared: Realistic · Atmospheric · Psychological Horror

Little Nightmares
Shared: Adventure · Atmospheric · Horror

DreadOut
Shared: Adventure · Horror · Third Person

The Medium
Shared: Adventure · Horror · Atmospheric

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Adventure · Female Protagonist

Stray
Shared: Adventure · Atmospheric · Third Person

MiSide
Shared: Psychological Horror · 3D · Horror

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Mystery

What Remains of Edith Finch
Shared: Atmospheric · Adventure · Mystery

A Plague Tale: Requiem
Shared: Adventure · Third Person · Atmospheric

Alan Wake
Shared: Adventure · Third Person · Horror

Rental
Shared: Horror · Atmospheric · Adventure

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

Little Nightmares II
Shared: Adventure · Horror · Atmospheric

Tomb Raider Game of the Year
Shared: Adventure · Third Person · Female Protagonist

The Room Three
Shared: Adventure · Mystery · Atmospheric

A Plague Tale: Innocence
Shared: Adventure · Atmospheric · Third Person

The Death | Thần Trùng
Shared: Adventure · Horror · Realistic

Welcome to Kowloon
Shared: Adventure · Atmospheric · Horror

Poppy Playtime
Shared: Horror · Adventure · Singleplayer

Oxenfree
Shared: Atmospheric · Adventure · Mystery

Outer Wilds
Shared: Adventure · Mystery · Atmospheric

The Room Two
Shared: Adventure · Atmospheric · Mystery