Games like Lost & Round
Games like Lost & Round include Portal 2, Wavetale, Sonic Frontiers, Ori and the Will of the Wisps, and Trine 3: The Artifacts of Power. We matched them by the tags players give Lost & Round on Steam (3D Platformer, Isometric, Platformer, Action-Adventure, and 3D): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Story Rich · 3D Platformer

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

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

Ori and the Will of the Wisps
Shared: Platformer · Story Rich · Action-Adventure

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

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

The Big Catch: Tacklebox
Shared: 3D Platformer · Platformer · Action-Adventure

The Last Campfire
Shared: Puzzle · 3D Platformer · Story Rich

Mirror's Edge™
Shared: Action-Adventure · 3D Platformer · Platformer

Brothers - A Tale of Two Sons
Shared: Story Rich · Adventure · Puzzle

Pumpkin Jack
Shared: 3D Platformer · Colorful · Platformer

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

Psychonauts 2
Shared: 3D Platformer · Story Rich · Platformer

Chants of Sennaar
Shared: Puzzle · Colorful · Stylized

Indiana Jones and the Great Circle
Shared: Action-Adventure · Story Rich · Puzzle

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

TUNIC
Shared: Isometric · Action-Adventure · Puzzle

It Takes Two
Shared: Story Rich · Puzzle · 3D Platformer

Portal
Shared: 3D Platformer · Puzzle · Platformer

My Little Puppy
Shared: Story Rich · Colorful · 3D

Phantom Abyss
Shared: 3D Platformer · Action-Adventure · Platformer

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

Trine 2: Complete Story
Shared: Platformer · Action-Adventure · Puzzle

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