Games like Aquarium at August 32nd
Games like Aquarium at August 32nd include Firewatch, What Remains of Edith Finch, Platform 8, Quern - Undying Thoughts, and A Story About My Uncle. We matched them by the tags players give Aquarium at August 32nd on Steam (Adventure, Walking Simulator, 3D Platformer, Hidden Object, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · First-Person

Platform 8
Shared: Adventure · Walking Simulator · Hidden Object

Quern - Undying Thoughts
Shared: Adventure · Walking Simulator · Mystery

A Story About My Uncle
Shared: Adventure · First-Person · 3D Platformer

POOLS
Shared: Walking Simulator · First-Person · Adventure

The Room Three
Shared: Adventure · Mystery · Hidden Object

The Room
Shared: Adventure · Hidden Object · Mystery

Layers of Fear (2016)
Shared: Walking Simulator · Adventure · First-Person

The Room 4: Old Sins
Shared: Adventure · Mystery · Hidden Object

Beside Myself
Shared: Adventure · Walking Simulator · 3D Platformer

The Room Two
Shared: Adventure · Hidden Object · Mystery

The Stanley Parable
Shared: Walking Simulator · First-Person · Adventure

Slime Rancher 2
Shared: Adventure · First-Person · Relaxing

Blair Witch
Shared: Adventure · First-Person · Walking Simulator

The Beginner's Guide
Shared: Walking Simulator · Adventure · First-Person

Boxes: Lost Fragments
Shared: Adventure · 3D · Mystery

Millennium Dream
Shared: Adventure · Walking Simulator · First-Person

I'm counting to 6...
Shared: Adventure · Walking Simulator · 3D Platformer

ROUTINE
Shared: Adventure · Cinematic · Walking Simulator

Still Wakes the Deep
Shared: Walking Simulator · First-Person · Adventure

The Last Campfire
Shared: Adventure · 3D Platformer · Indie

Valley
Shared: Adventure · First-Person · Walking Simulator

Riven
Shared: Adventure · First-Person · Walking Simulator