Games like Normal Days
Games like Normal Days include Blue Prince, Portal 2, Quern - Undying Thoughts, Firewatch, and Murders on the Yangtze River. We matched them by the tags players give Normal Days on Steam (Adventure, Puzzle, Simulation, Investigation, and Mystery): closest matches first, and among equally close ones the better-known games.
Blue Prince
Shared: Puzzle · Mystery · Investigation
Portal 2
Shared: Puzzle · Singleplayer · First-Person
Quern - Undying Thoughts
Shared: Adventure · Puzzle · Mystery
Firewatch
Shared: Adventure · Mystery · First-Person
Murders on the Yangtze River
Shared: Puzzle · Adventure · Mystery
The Room
Shared: Puzzle · Mystery · Adventure
Poppy Playtime
Shared: Puzzle · Singleplayer · First-Person
Escape Simulator
Shared: Puzzle · Adventure · First-Person
Riven
Shared: Adventure · Puzzle · First-Person
What Remains of Edith Finch
Shared: Adventure · Mystery · First-Person
The Room 4: Old Sins
Shared: Puzzle · Adventure · Mystery
Outer Wilds
Shared: Adventure · Mystery · Puzzle
SchoolBoy Runaway
Shared: Adventure · Puzzle · Simulation
The Room Three
Shared: Puzzle · Adventure · Mystery
Portal
Shared: Puzzle · First-Person · Singleplayer
Return of the Obra Dinn
Shared: Puzzle · Mystery · Adventure
Killer Frequency
Shared: Adventure · Puzzle · Simulation
The Witness
Shared: Puzzle · First-Person · Singleplayer
Call of the Sea
Shared: Adventure · Puzzle · First-Person
Strange Horticulture
Shared: Puzzle · Mystery · Investigation
The Painscreek Killings
Shared: Investigation · Puzzle · Mystery
The Last Campfire
Shared: Adventure · Puzzle · Singleplayer
The Room Two
Shared: Puzzle · Mystery · Adventure
Viewfinder
Shared: Puzzle · Adventure · First-Person