Games like I Lost Someone
Games like I Lost Someone include Until Then, To the Moon, OPUS: Echo of Starsong - Full Bloom Edition, Refind Self: The Personality Test Game, and A Bird Story. We matched them by the tags players give I Lost Someone on Steam (Casual, Interactive Fiction, Visual Novel, Choose Your Own Adventure, and Immersive Sim): closest matches first, and among equally close ones the better-known games.

Until Then
Shared: Visual Novel · Interactive Fiction · Pixel Graphics

To the Moon
Shared: Interactive Fiction · Pixel Graphics · Emotional

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Interactive Fiction · Emotional

Refind Self: The Personality Test Game
Shared: Interactive Fiction · Visual Novel · Choose Your Own Adventure

A Bird Story
Shared: Interactive Fiction · Indie · Pixel Graphics

Coffee Talk
Shared: Visual Novel · Interactive Fiction · Pixel Graphics

Impostor Factory
Shared: Pixel Graphics · Emotional · 2D

Finding Paradise
Shared: Emotional · Pixel Graphics · 2D

Far Away
Shared: Visual Novel · Choose Your Own Adventure · Singleplayer

Florence
Shared: Casual · Indie · Interactive Fiction

No Case Should Remain Unsolved
Shared: Interactive Fiction · Visual Novel · Pixel Graphics

Class of '09
Shared: Casual · Choose Your Own Adventure · Visual Novel

There Is No Game: Wrong Dimension
Shared: Casual · Indie · Pixel Graphics

Suzerain
Shared: Visual Novel · Choose Your Own Adventure · Interactive Fiction

I Wani Hug that Gator!
Shared: Visual Novel · Choose Your Own Adventure · Interactive Fiction

Love Is All Around
Shared: Visual Novel · Interactive Fiction · Singleplayer

Billionaire Lovers
Shared: Visual Novel · Casual · Interactive Fiction

The Cosmic Wheel Sisterhood
Shared: Interactive Fiction · Visual Novel · Casual

Man I Just Wanna Go Home
Shared: Interactive Fiction · Visual Novel · Choose Your Own Adventure

Milk outside a bag of milk outside a bag of milk
Shared: Visual Novel · Pixel Graphics · Indie

The Test
Shared: Choose Your Own Adventure · Pixel Graphics · Visual Novel

S4U: CITYPUNK 2011 AND LOVE PUNCH
Shared: Visual Novel · Immersive Sim · Pixel Graphics

The Heroes Around Me
Shared: Visual Novel · Interactive Fiction · Pixel Graphics

ERROR143
Shared: Visual Novel · Casual · Indie