Games like Don't Forget
Games like Don't Forget include What Remains of Edith Finch, Sally Face - Episode One, Before Your Eyes, Impostor Factory, and Amnesia: A Machine For Pigs. We matched them by the tags players give Don't Forget on Steam (Interactive Fiction, Psychological Horror, Emotional, Exploration, and Story Rich): closest matches first, and among equally close ones the better-known games.

What Remains of Edith Finch
Shared: Story Rich · Exploration · Walking Simulator

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

Before Your Eyes
Shared: Emotional · Interactive Fiction · Story Rich

Impostor Factory
Shared: Emotional · Story Rich · Singleplayer

Amnesia: A Machine For Pigs
Shared: Story Rich · Psychological Horror · Interactive Fiction

Dear Esther: Landmark Edition
Shared: Interactive Fiction · Exploration · Psychological Horror

Firewatch
Shared: Story Rich · Exploration · Singleplayer

To the Moon
Shared: Story Rich · Emotional · Interactive Fiction

Outer Wilds
Shared: Exploration · Story Rich · Singleplayer

Gorogoa
Shared: Hand-drawn · Singleplayer · Puzzle

SOMA
Shared: Psychological Horror · Story Rich · Exploration

Layers of Fear (2016)
Shared: Psychological Horror · Singleplayer · Story Rich

Outcore: Desktop Adventure
Shared: Psychological Horror · Story Rich · Exploration

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Emotional · Interactive Fiction · Story Rich

Mouthwashing
Shared: Psychological Horror · Story Rich · Walking Simulator

The Beginner's Guide
Shared: Story Rich · Walking Simulator · Singleplayer

Beacon Pines
Shared: Emotional · Story Rich · Interactive Fiction

OneShot
Shared: Story Rich · Singleplayer · Puzzle

Finding Paradise
Shared: Emotional · Story Rich · Interactive Fiction

OMORI
Shared: Psychological Horror · Story Rich · Hand-drawn

Until Then
Shared: Emotional · Interactive Fiction · Story Rich

Gone Home
Shared: Exploration · Walking Simulator · Story Rich

Fran Bow
Shared: Psychological Horror · Story Rich · Puzzle

Spirit of the North
Shared: Exploration · Singleplayer · Story Rich