Games like Mindform
Games like Mindform include Portal 2, A Story About My Uncle, Ori and the Will of the Wisps, Firewatch, and Hollow Knight. We matched them by the tags players give Mindform on Steam (Platformer, eSports, 3D, First-Person, and Stylized): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · First-Person · Funny

A Story About My Uncle
Shared: First-Person · Platformer · Atmospheric

Ori and the Will of the Wisps
Shared: Platformer · Atmospheric · Adventure

Firewatch
Shared: Atmospheric · First-Person · Adventure

Hollow Knight
Shared: Platformer · Atmospheric · Indie

RV There Yet?
Shared: Funny · First-Person · 3D

Portal
Shared: First-Person · Funny · Platformer

MiSide
Shared: First-Person · 3D · Atmospheric

PEAK
Shared: First-Person · 3D · Adventure

Wavetale
Shared: Platformer · 3D · Adventure

Psychonauts
Shared: Platformer · Funny · Adventure

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

Cairn
Shared: Stylized · Atmospheric · Sports

Pro Soccer Online
Shared: eSports · Sports · 3D

Neon White
Shared: Platformer · Stylized · First-Person

The Stanley Parable
Shared: First-Person · Funny · Indie

Mirror's Edge™
Shared: First-Person · Platformer · Action-Adventure

BioShock Infinite
Shared: First-Person · Action · Atmospheric

Psychonauts 2
Shared: Platformer · Funny · Story Rich

Sonic Frontiers
Shared: 3D · Platformer · Adventure

Get To Work
Shared: Funny · Platformer · Adventure