Games like Highly Likely
Games like Highly Likely include GRIS, Hollow Knight: Silksong, Hollow Knight, Brothers - A Tale of Two Sons, and Gorogoa. We matched them by the tags players give Highly Likely on Steam (Adventure, Indie, Historical, 2D, and Realistic): closest matches first, and among equally close ones the better-known games.

GRIS
Shared: Indie · Adventure · Beautiful

Hollow Knight: Silksong
Shared: Indie · 2D · Adventure

Hollow Knight
Shared: Indie · 2D · Adventure

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Controller

Gorogoa
Shared: Indie · Hand-drawn · Singleplayer

Valiant Hearts: The Great War™ / Soldats Inconnus : Mémoires de la Grande Guerre™
Shared: Historical · Adventure · 2D

Red Dead Redemption 2
Shared: Adventure · Realistic · Singleplayer

Kingdom Come: Deliverance
Shared: Historical · Realistic · Adventure

Journey
Shared: Adventure · Indie · Beautiful

Old Man's Journey
Shared: Adventure · Indie · Hand-drawn

Carto
Shared: Indie · Adventure · Hand-drawn

The Last Campfire
Shared: Adventure · Indie · Singleplayer

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

Sally Face - Episode One
Shared: Indie · Adventure · Story Rich

OneShot
Shared: Indie · Adventure · Singleplayer

LIMBO
Shared: Indie · Adventure · 2D

Kingdom Come: Deliverance II
Shared: Adventure · Realistic · Singleplayer

To the Moon
Shared: Indie · Adventure · Singleplayer

Firewatch
Shared: Adventure · Indie · Singleplayer

OMORI
Shared: Indie · Hand-drawn · 2D

Mark of the Ninja
Shared: Indie · 2D · Adventure

Nine Sols
Shared: 2D · Indie · Hand-drawn

SANABI
Shared: Adventure · Indie · 2D

Stray
Shared: Adventure · Singleplayer · Atmospheric