Games like Startup Valley Adventure
Games like Startup Valley Adventure include Tales from the Borderlands, Firewatch, The Henry Stickmin Collection, Dispatch, and The Stanley Parable. We matched them by the tags players give Startup Valley Adventure on Steam (Adventure, Indie, Atmospheric, Singleplayer, and Funny): closest matches first, and among equally close ones the better-known games.

Tales from the Borderlands
Shared: Adventure · Singleplayer · Comedy

Firewatch
Shared: Adventure · Atmospheric · Singleplayer

The Henry Stickmin Collection
Shared: Funny · Choose Your Own Adventure · Singleplayer

Dispatch
Shared: Singleplayer · Choices Matter · Comedy

The Stanley Parable
Shared: Indie · Comedy · Adventure

The Wolf Among Us
Shared: Adventure · Choose Your Own Adventure · Choices Matter

Life is Strange: Before the Storm
Shared: Atmospheric · Adventure · Singleplayer

The Walking Dead
Shared: Adventure · Singleplayer · Episodic

The Walking Dead: Season Two
Shared: Adventure · Singleplayer · Atmospheric

Undertale
Shared: Funny · Indie · Singleplayer

The Witcher 3: Wild Hunt — Remastered
Shared: Atmospheric · Adventure · Singleplayer

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Funny

Batman - The Telltale Series
Shared: Adventure · Singleplayer · Choices Matter

OneShot
Shared: Indie · Atmospheric · Singleplayer

Little Inferno
Shared: Indie · Singleplayer · Funny

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

Little Nightmares
Shared: Adventure · Atmospheric · Singleplayer

West of Loathing
Shared: Adventure · Funny · Indie

Deponia
Shared: Adventure · Singleplayer · Indie

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

GRIS
Shared: Atmospheric · Indie · Adventure

Youtubers Life
Shared: Singleplayer · Adventure · Management

The Walking Dead: A New Frontier
Shared: Adventure · Atmospheric · Singleplayer

South Park™: The Stick of Truth™
Shared: Adventure · Funny · Comedy