Games like SU!
Games like SU! include Gorilla Tag, Refunct, VHOLUME, Superflight, and Mirror's Edge™ Catalyst. We matched them by the tags players give SU! on Steam (Parkour, Procedural Generation, PvE, 3D Platformer, and Arcade): closest matches first, and among equally close ones the better-known games.

Gorilla Tag
Shared: VR · Parkour · 3D Platformer

Refunct
Shared: Parkour · 3D Platformer · Platformer

VHOLUME
Shared: Parkour · 3D Platformer · Arcade

Superflight
Shared: Procedural Generation · Flight · Indie

Mirror's Edge™ Catalyst
Shared: Parkour · 3D Platformer · Cyberpunk

Bomb Rush Cyberfunk
Shared: 3D Platformer · Parkour · Cyberpunk

Mirror's Edge™
Shared: Parkour · 3D Platformer · First-Person

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

Neon White
Shared: Parkour · 3D Platformer · Platformer

X-Plane 12
Shared: VR · Immersive Sim · Flight

Pseudoregalia
Shared: Parkour · 3D Platformer · Platformer

Haste
Shared: Parkour · 3D Platformer · Arcade

Clustertruck
Shared: Parkour · 3D Platformer · First-Person

Rooftops & Alleys: The Parkour Game
Shared: Parkour · 3D Platformer · Immersive Sim

White Knuckle
Shared: Parkour · 3D Platformer · Platformer

Cyber Hook
Shared: Parkour · 3D Platformer · Indie

Deep Rock Galactic
Shared: PvE · Procedural Generation · First-Person

Into the Radius VR
Shared: VR · PvE · Surreal

Project Wingman
Shared: VR · Flight · Arcade

BETON BRUTAL
Shared: Parkour · 3D Platformer · Platformer

Shadows of Doubt
Shared: Procedural Generation · Immersive Sim · Cyberpunk

SEUM: Speedrunners from Hell
Shared: Parkour · 3D Platformer · Platformer

Only Climb: Better Together
Shared: 3D Platformer · Arcade · Platformer

Boson X
Shared: Parkour · Arcade · 3D Platformer