Games like Ballin'
Games like Ballin' include Portal 2, Portal, Sonic Adventure DX, Sonic Adventure 2, and Only Climb: Better Together. We matched them by the tags players give Ballin' on Steam (Action, Casual, 3D Platformer, Precision Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle Platformer · Puzzle

Portal
Shared: 3D Platformer · Puzzle Platformer · Puzzle

Sonic Adventure DX
Shared: 3D Platformer · Platformer · Action

Sonic Adventure 2
Shared: Action · 3D Platformer · Platformer

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

EDGE
Shared: Action · Puzzle Platformer · Platformer

SONIC X SHADOW GENERATIONS
Shared: Action · 3D Platformer · Platformer

Monument Valley 2
Shared: Casual · Action · Puzzle

Planet of Lana
Shared: Action · Puzzle Platformer · Platformer

Tomb Raider IV-VI Remastered
Shared: Action · 3D Platformer · Platformer

SpongeBob SquarePants: The Cosmic Shake
Shared: 3D Platformer · Action · Platformer

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

Chained Together
Shared: Casual · Platformer · Puzzle Platformer

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · Action

Crash Bandicoot™ 4: It’s About Time
Shared: Action · 3D Platformer · Platformer

Sonic Frontiers
Shared: 3D Platformer · Action · 3D

Spyro™ Reignited Trilogy
Shared: 3D Platformer · Action · Platformer

Trine 3: The Artifacts of Power
Shared: 3D Platformer · Puzzle Platformer · Action

SpongeBob SquarePants: Titans of the Tide
Shared: 3D Platformer · Action · Platformer

Neon White
Shared: 3D Platformer · Action · Platformer

Ratchet & Clank: Rift Apart
Shared: 3D Platformer · Action · Singleplayer

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Super Meat Boy 3D
Shared: Action · Precision Platformer · 3D Platformer

Quantum Conundrum
Shared: 3D Platformer · Puzzle Platformer · Casual