Games like Dear Esther: Landmark Edition
Games like Dear Esther: Landmark Edition include Firewatch, What Remains of Edith Finch, Amnesia: A Machine For Pigs, Outer Wilds, and Layers of Fear (2016). We matched them by the tags players give Dear Esther: Landmark Edition on Steam (Walking Simulator, Exploration, Interactive Fiction, Puzzle, and First-Person): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · Exploration · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · First-Person

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · Horror

Outer Wilds
Shared: Exploration · Puzzle · Atmospheric

Layers of Fear (2016)
Shared: Walking Simulator · Psychological Horror · Horror

Scanner Sombre
Shared: Walking Simulator · Exploration · First-Person

The Witness
Shared: Exploration · Puzzle · First-Person

INFRA
Shared: Exploration · Puzzle · Walking Simulator

The Exit 8
Shared: Exploration · Walking Simulator · Puzzle

SOMA
Shared: Psychological Horror · Horror · Exploration

Killer Frequency
Shared: Interactive Fiction · Puzzle · Walking Simulator

The Painscreek Killings
Shared: Exploration · Puzzle · Walking Simulator

Poppy Playtime
Shared: Puzzle · Horror · First-Person

The Vanishing of Ethan Carter
Shared: Walking Simulator · Exploration · First-Person

Gone Home
Shared: Walking Simulator · Exploration · First-Person

Big Walk
Shared: Exploration · Puzzle · Relaxing

Quern - Undying Thoughts
Shared: Puzzle · Exploration · Walking Simulator

Still Wakes the Deep
Shared: Walking Simulator · Psychological Horror · Horror

Inside the Backrooms
Shared: Puzzle · Horror · Psychological Horror

The Park®
Shared: Walking Simulator · Psychological Horror · First-Person

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Exploration · Open World

Garten of Banban
Shared: First-Person · Horror · Puzzle

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

Homesick
Shared: Exploration · Puzzle · Walking Simulator