Games like Lost Horizon
Games like Lost Horizon include Grim Fandango Remastered, Deponia, The Dark Eye: Memoria, The Secret of Monkey Island: Special Edition, and The Night of the Rabbit. We matched them by the tags players give Lost Horizon on Steam (Adventure, Point & Click, Story Rich, War, and Stylized): closest matches first, and among equally close ones the better-known games.

Grim Fandango Remastered
Shared: Adventure · Point & Click · Story Rich

Deponia
Shared: Adventure · Point & Click · Story Rich

The Dark Eye: Memoria
Shared: Adventure · Point & Click · Story Rich

The Secret of Monkey Island: Special Edition
Shared: Adventure · Point & Click · Classic

The Night of the Rabbit
Shared: Adventure · Point & Click · Story Rich

Thimbleweed Park™
Shared: Adventure · Point & Click · Story Rich

Deponia: The Complete Journey
Shared: Adventure · Point & Click · Story Rich

Indiana Jones® and the Fate of Atlantis™
Shared: Adventure · Point & Click · 1990's

Broken Age
Shared: Adventure · Point & Click · Story Rich

Day of the Tentacle Remastered
Shared: Adventure · Point & Click · 1990's

The Curse of Monkey Island
Shared: Point & Click · Adventure · 1990's

The Dark Eye: Chains of Satinav
Shared: Adventure · Point & Click · Story Rich

Chants of Sennaar
Shared: Adventure · Point & Click · Puzzle

Monkey Island™ 2 Special Edition: LeChuck’s Revenge™
Shared: Adventure · Point & Click · Classic

Valiant Hearts: The Great War™ / Soldats Inconnus : Mémoires de la Grande Guerre™
Shared: Adventure · War · Story Rich

A New Beginning: Final Cut
Shared: Adventure · Point & Click · Great Soundtrack

My Brother Rabbit
Shared: Adventure · Point & Click · Story Rich

The Longest Journey
Shared: Adventure · Point & Click · Story Rich

I Have No Mouth, and I Must Scream
Shared: Adventure · Point & Click · Story Rich

The Inner World
Shared: Adventure · Point & Click · Story Rich

The Book of Unwritten Tales
Shared: Adventure · Point & Click · Story Rich

Phoenix Wright: Ace Attorney Trilogy
Shared: Story Rich · Great Soundtrack · Adventure

The Dig®
Shared: Adventure · Point & Click · Great Soundtrack

Chaos on Deponia
Shared: Adventure · Point & Click · Story Rich