Games like I_Darkness
Games like I_Darkness include Blue Prince, The Room, The Witness, Riven, and Poppy Playtime. We matched them by the tags players give I_Darkness on Steam (Casual, Puzzle, Exploration, Investigation, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Blue Prince
Shared: Puzzle · Exploration · Investigation
The Room
Shared: Puzzle · Singleplayer · Atmospheric
The Witness
Shared: Puzzle · Exploration · First-Person
Riven
Shared: Puzzle · Exploration · Singleplayer
Poppy Playtime
Shared: Puzzle · Singleplayer · First-Person
The House of Da Vinci
Shared: Puzzle · Exploration · Singleplayer
The Room Two
Shared: Puzzle · Atmospheric · Singleplayer
What Remains of Edith Finch
Shared: Exploration · Atmospheric · First-Person
Outer Wilds
Shared: Exploration · Puzzle · Atmospheric
The Talos Principle
Shared: Puzzle · First-Person · Singleplayer
Moncage
Shared: Casual · Puzzle · Singleplayer
The Room 4: Old Sins
Shared: Puzzle · Singleplayer · Exploration
Antichamber
Shared: Puzzle · Exploration · First-Person
Call of the Sea
Shared: Puzzle · First-Person · Casual
FEZ
Shared: Puzzle · Exploration · Casual
The Painscreek Killings
Shared: Investigation · Exploration · Puzzle
Murders on the Yangtze River
Shared: Puzzle · Exploration · Investigation
Sizeable
Shared: Casual · Puzzle · Exploration
The Room Three
Shared: Puzzle · Singleplayer · Atmospheric
Gorogoa
Shared: Puzzle · Casual · Singleplayer
Firewatch
Shared: Atmospheric · Exploration · First-Person
Strange Horticulture
Shared: Puzzle · Investigation · Dark
Slime Rancher
Shared: Exploration · Singleplayer · First-Person
Spirit of the North
Shared: Exploration · Puzzle · Casual