Games like Ball Game
Games like Ball Game include Chained Together, Getting Over It with Bennett Foddy, Climber Animals: Together, A Story About My Uncle, and VHOLUME. We matched them by the tags players give Ball Game on Steam (Adventure, Simulation, Casual, Psychological Horror, and Physics): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Casual · Platformer

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Physics · Platformer

Climber Animals: Together
Shared: Simulation · Physics · Casual

A Story About My Uncle
Shared: Adventure · Platformer · Parkour

VHOLUME
Shared: Casual · 3D Platformer · Platformer

How to Fish
Shared: Adventure · Physics · Indie

Gorilla Tag
Shared: Psychological Horror · Parkour · 3D Platformer

Totally Accurate Battle Simulator
Shared: Simulation · Physics · Adventure

Berry Bury Berry
Shared: Psychological Horror · Physics · 3D

Garry's Mod
Shared: Physics · Casual · Simulation

ALTF4
Shared: Physics · 3D Platformer · Casual

That's not my Neighbor
Shared: Adventure · Casual · Simulation

RV There Yet?
Shared: Adventure · Physics · Casual

Goat Simulator
Shared: Simulation · Physics · Casual

PEAK
Shared: Adventure · Physics · 3D

Refunct
Shared: Casual · 3D Platformer · Parkour

I Am Bread
Shared: Simulation · Adventure · Physics

Peaks of Yore
Shared: Adventure · Psychological Horror · Physics

Slime Rancher
Shared: Adventure · Simulation · Casual

[Chillas Art] The Convenience Store
Shared: Adventure · Psychological Horror · Simulation

Wobbly Life
Shared: Adventure · Simulation · Casual

The Coin Game
Shared: Casual · Arcade · Simulation

Portal 2
Shared: Platformer · Adventure · First-Person

MiSide
Shared: Psychological Horror · 3D · Adventure