Games like Section Six
Games like Section Six include A Bird Story, To the Moon, GRIS, Hollow Knight, and Hollow Knight: Silksong. We matched them by the tags players give Section Six on Steam (Adventure, Indie, Simulation, Interactive Fiction, and Visual Novel): closest matches first, and among equally close ones the better-known games.

A Bird Story
Shared: Indie · Adventure · Great Soundtrack

To the Moon
Shared: Indie · Adventure · Great Soundtrack

GRIS
Shared: Indie · Adventure · Great Soundtrack

Hollow Knight
Shared: Indie · Great Soundtrack · Adventure

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · Adventure

Papers, Please
Shared: Indie · Simulation · Singleplayer

OneShot
Shared: Indie · Great Soundtrack · Adventure

Gorogoa
Shared: Indie · Adventure · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Indie

Tiny Bunny
Shared: Visual Novel · Atmospheric · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Interactive Fiction

LoveChoice
Shared: Visual Novel · Simulation · Great Soundtrack

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

The Red Strings Club
Shared: Indie · Adventure · Great Soundtrack

Florence
Shared: Indie · Adventure · Interactive Fiction

Hyper Light Drifter
Shared: Indie · Adventure · Great Soundtrack

Undertale
Shared: Great Soundtrack · Indie · Choices Matter

Pyre
Shared: Indie · Great Soundtrack · Visual Novel

The Life and Suffering of Sir Brante
Shared: Interactive Fiction · Indie · Visual Novel

OMORI
Shared: Indie · Great Soundtrack · Adventure

Chants of Sennaar
Shared: Adventure · Indie · Singleplayer

Suzerain
Shared: Visual Novel · Interactive Fiction · Indie

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

Beholder
Shared: Simulation · Atmospheric · Indie