Games like Grapple League
Games like Grapple League include Hot Lava, SEUM: Speedrunners from Hell, Haste, Mirror's Edge™ Catalyst, and Portal 2. We matched them by the tags players give Grapple League on Steam (Precision Platformer, 3D Platformer, Runner, Racing, and Puzzle): closest matches first, and among equally close ones the better-known games.

Hot Lava
Shared: Precision Platformer · 3D Platformer · Racing

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

Haste
Shared: 3D Platformer · Parkour · Runner

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

Portal 2
Shared: Puzzle · Platformer · 3D Platformer

Celeste
Shared: Precision Platformer · Difficult · Platformer

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

Neon White
Shared: 3D Platformer · Parkour · Precision Platformer

A Story About My Uncle
Shared: Parkour · 3D Platformer · Puzzle

Portal
Shared: 3D Platformer · Puzzle · First-Person

VHOLUME
Shared: 3D Platformer · Parkour · Runner

Pseudoregalia
Shared: 3D Platformer · Parkour · Female Protagonist

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

Get To Work
Shared: Precision Platformer · 3D Platformer · Difficult

White Knuckle
Shared: 3D Platformer · Parkour · Precision Platformer

Only Climb: Better Together
Shared: Precision Platformer · 3D Platformer · Difficult

Refunct
Shared: 3D Platformer · Parkour · Platformer

BETON BRUTAL
Shared: 3D Platformer · Precision Platformer · Parkour

DeadCore
Shared: Parkour · Platformer · 3D Platformer

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Exertus
Shared: Precision Platformer · 3D Platformer · Parkour

Cloudbuilt
Shared: 3D Platformer · Parkour · Precision Platformer

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: 3D Platformer · Racing · Platformer

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