Games like Endling - Extinction is Forever
Games like Endling - Extinction is Forever include Shelter 2, Stray, The Long Dark, Shelter, and The Last Campfire. We matched them by the tags players give Endling - Extinction is Forever on Steam (Emotional, Adventure, Atmospheric, Indie, and Survival): closest matches first, and among equally close ones the better-known games.

Shelter 2
Shared: Adventure · Atmospheric · Emotional

Stray
Shared: Adventure · Atmospheric · Cute

The Long Dark
Shared: Survival · Atmospheric · Adventure

Shelter
Shared: Adventure · Survival · Nature

The Last Campfire
Shared: Adventure · Emotional · Indie

This War of Mine
Shared: Atmospheric · Survival · Singleplayer

Slime Rancher
Shared: Adventure · Cute · Exploration

What Remains of Edith Finch
Shared: Atmospheric · Adventure · Exploration

OneShot
Shared: Indie · Atmospheric · Cute

Rise of the Tomb Raider™
Shared: Adventure · Singleplayer · Exploration

My Little Puppy
Shared: Adventure · Emotional · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Indie

A Plague Tale: Innocence
Shared: Adventure · Atmospheric · Singleplayer

Brothers - A Tale of Two Sons
Shared: Adventure · Atmospheric · Emotional

Rain World
Shared: Atmospheric · Survival · Indie

Cairn
Shared: Indie · Adventure · Atmospheric

FAR: Lone Sails
Shared: Adventure · Atmospheric · Indie

Copycat
Shared: Emotional · Adventure · Indie

Neva
Shared: Adventure · Atmospheric · Emotional

Carto
Shared: Indie · Cute · Adventure

Ori and the Will of the Wisps
Shared: Adventure · Atmospheric · Singleplayer

GRIS
Shared: Atmospheric · Indie · Adventure

Finding Paradise
Shared: Emotional · Adventure · Atmospheric

To the Moon
Shared: Emotional · Indie · Adventure