Games like Split Souls
Games like Split Souls include LIMBO, Portal 2, Braid, FEZ, and Celeste. We matched them by the tags players give Split Souls on Steam (Adventure, Platformer, Puzzle, 2D Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Puzzle · Platformer · Puzzle Platformer

Portal 2
Shared: Platformer · Puzzle · Singleplayer

Braid
Shared: Puzzle · Puzzle Platformer · 2D Platformer

FEZ
Shared: Platformer · Puzzle · Adventure

Celeste
Shared: Platformer · 2D Platformer · Indie

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Puzzle

Neva
Shared: Adventure · Platformer · Puzzle

Little Nightmares
Shared: Adventure · Puzzle Platformer · Puzzle

Out There Somewhere
Shared: Platformer · Adventure · Puzzle

Mind Over Magnet
Shared: Adventure · Puzzle · Puzzle Platformer

Hue
Shared: Adventure · Puzzle · Platformer

Hollow Knight
Shared: Platformer · 2D · Adventure

GRIS
Shared: Adventure · Platformer · Indie

Creepy Tale
Shared: Adventure · Puzzle Platformer · Puzzle

Oddworld: New 'n' Tasty
Shared: Platformer · Adventure · Puzzle Platformer

INSIDE
Shared: Puzzle Platformer · Adventure · Singleplayer

Squishy the Suicidal Pig
Shared: Platformer · Puzzle · Adventure

Nihilumbra
Shared: Adventure · Platformer · Puzzle

Laughing to Die
Shared: Adventure · Puzzle · Platformer

Defy Gravity Extended
Shared: Platformer · Puzzle Platformer · Puzzle

BEEP
Shared: Platformer · Adventure · Indie

Little Nightmares II
Shared: Adventure · Puzzle · Singleplayer

ANIMAL WELL
Shared: Puzzle · Platformer · Puzzle Platformer

Seen
Shared: Adventure · Puzzle · Indie