Games like Train Games
Games like Train Games include The Henry Stickmin Collection, Return to Monkey Island, Storyteller, There Is No Game: Wrong Dimension, and That's not my Neighbor. We matched them by the tags players give Train Games on Steam (Adventure, Point & Click, 2D, Cartoony, and Comedy): closest matches first, and among equally close ones the better-known games.

The Henry Stickmin Collection
Shared: Comedy · Multiple Endings · Point & Click

Return to Monkey Island
Shared: Adventure · Point & Click · Comedy

Storyteller
Shared: Point & Click · Adventure · 2D

There Is No Game: Wrong Dimension
Shared: Point & Click · Adventure · Comedy

That's not my Neighbor
Shared: Adventure · Point & Click · Choices Matter

Reventure
Shared: Adventure · 2D · Comedy

Deponia
Shared: Adventure · Point & Click · Comedy

Lil' Guardsman
Shared: Adventure · Point & Click · Comedy

Tales from the Borderlands
Shared: Adventure · Comedy · Point & Click

The Wolf Among Us
Shared: Adventure · Choices Matter · Multiple Endings

Undertale
Shared: Choices Matter · Multiple Endings · 2D

Broken Age
Shared: Adventure · Point & Click · Comedy

Randal's Monday
Shared: Adventure · Point & Click · Comedy

McPixel 3
Shared: Adventure · Point & Click · 2D

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

CHUCHEL
Shared: Point & Click · Comedy · Cartoony

Papers, Please
Shared: Point & Click · Singleplayer · Multiple Endings

Shadows Over Loathing
Shared: Adventure · Point & Click · Comedy

Deponia: The Complete Journey
Shared: Adventure · Point & Click · Comedy

Day of the Tentacle Remastered
Shared: Adventure · Point & Click · Comedy

The Walking Dead
Shared: Adventure · Point & Click · Choices Matter

Gorogoa
Shared: Point & Click · Adventure · Singleplayer

Death and Taxes
Shared: Choices Matter · Point & Click · Multiple Endings

Chaos on Deponia
Shared: Adventure · Point & Click · Comedy