Games like Door4:Ultimatum
Games like Door4:Ultimatum include The Witness, Outer Wilds, Firewatch, Chants of Sennaar, and Antichamber. We matched them by the tags players give Door4:Ultimatum on Steam (Puzzle, Indie, Exploration, Adventure, and First-Person): closest matches first, and among equally close ones the better-known games.
The Witness
Shared: Puzzle · Exploration · First-Person
Outer Wilds
Shared: Exploration · Adventure · Puzzle
Firewatch
Shared: Adventure · First-Person · Exploration
Chants of Sennaar
Shared: Puzzle · Indie · Adventure
Antichamber
Shared: Puzzle · Indie · First-Person
Slime Rancher
Shared: Exploration · Adventure · First-Person
Blue Prince
Shared: Puzzle · Exploration · Indie
Fallout 4
Shared: Exploration · Open World · Adventure
Big Walk
Shared: Puzzle · Exploration · Adventure
What Remains of Edith Finch
Shared: Exploration · First-Person · Adventure
Stray
Shared: Adventure · Exploration · Puzzle
The Long Dark
Shared: Exploration · Open World · First-Person
COCOON
Shared: Puzzle · Adventure · Exploration
The Looker
Shared: Puzzle · Exploration · First-Person
The Talos Principle
Shared: Puzzle · First-Person · Exploration
Obduction
Shared: Puzzle · Adventure · Exploration
Slime Rancher 2
Shared: Open World · Singleplayer · First-Person
Riven
Shared: Puzzle · Exploration · Adventure
AER Memories of Old
Shared: Indie · Exploration · Adventure
INFRA
Shared: Puzzle · Exploration · First-Person
Call of the Sea
Shared: Puzzle · Adventure · First-Person
Carto
Shared: Indie · Puzzle · Exploration
RiME
Shared: Puzzle · Adventure · Exploration
The Room 4: Old Sins
Shared: Puzzle · Adventure · Singleplayer