Games like Memorrha
Games like Memorrha include The Witness, Firewatch, What Remains of Edith Finch, Outer Wilds, and Riven. We matched them by the tags players give Memorrha on Steam (Puzzle, Singleplayer, Indie, Adventure, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

The Witness
Shared: Puzzle · Singleplayer · Exploration

Firewatch
Shared: Adventure · Walking Simulator · Singleplayer

What Remains of Edith Finch
Shared: Walking Simulator · Singleplayer · Atmospheric

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Riven
Shared: Puzzle · Adventure · Singleplayer

Chants of Sennaar
Shared: Puzzle · Singleplayer · Adventure

Blue Prince
Shared: Puzzle · Singleplayer · Exploration

The Talos Principle
Shared: Puzzle · Singleplayer · First-Person

Stray
Shared: Singleplayer · Adventure · Puzzle

Antichamber
Shared: Puzzle · Indie · Singleplayer

Quern - Undying Thoughts
Shared: Puzzle · Adventure · Singleplayer

The Room
Shared: Puzzle · Singleplayer · Adventure

INFRA
Shared: Puzzle · Exploration · Walking Simulator

Return of the Obra Dinn
Shared: Puzzle · Singleplayer · Indie

Call of the Sea
Shared: Puzzle · Adventure · Indie

Obduction
Shared: Puzzle · Adventure · Indie

The Looker
Shared: Puzzle · Singleplayer · Exploration

Slime Rancher
Shared: Singleplayer · Adventure · Exploration

COCOON
Shared: Puzzle · Adventure · Indie

Journey
Shared: Indie · Adventure · Atmospheric

The Room 4: Old Sins
Shared: Puzzle · Adventure · Singleplayer

The Long Dark
Shared: Singleplayer · Exploration · Adventure

Poppy Playtime
Shared: Singleplayer · Puzzle · First-Person

Layers of Fear (2016)
Shared: Singleplayer · Walking Simulator · Indie