Games like Balls souls: Hardcore platformer
Games like Balls souls: Hardcore platformer include Chained Together, Refunct, Wavetale, Kao the Kangaroo: Round 2 (2003 re-release), and Pumpkin Jack. We matched them by the tags players give Balls souls: Hardcore platformer on Steam (Adventure, Casual, Platformer, 3D Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Platformer · Casual

Refunct
Shared: 3D Platformer · Casual · Puzzle Platformer

Wavetale
Shared: Adventure · 3D Platformer · Platformer

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

Pumpkin Jack
Shared: Adventure · 3D Platformer · Platformer

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

A Hat in Time
Shared: 3D Platformer · Adventure · Cute

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

Toree 2
Shared: Adventure · 3D Platformer · Platformer

Portal 2
Shared: Platformer · Puzzle Platformer · 3D Platformer

Tomb Raider IV-VI Remastered
Shared: Adventure · Platformer · Action-Adventure

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

Kena: Bridge of Spirits
Shared: Adventure · Action-Adventure · 3D Platformer

Legacy of Kain™ Soul Reaver 1&2 Remastered
Shared: Adventure · Platformer · Action-Adventure

Bomb Rush Cyberfunk
Shared: Adventure · 3D Platformer · Stylized

A Story About My Uncle
Shared: Adventure · Platformer · 3D Platformer

The Plucky Squire
Shared: Adventure · 3D Platformer · Action-Adventure

Toree 3D
Shared: Platformer · 3D Platformer · 3D

Omno
Shared: Adventure · Puzzle Platformer · Platformer

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

Pikuniku
Shared: Adventure · Casual · Cute

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

ATLYSS
Shared: Adventure · 3D Platformer · Cute

Tinykin
Shared: 3D Platformer · Action-Adventure · Adventure