Games like Tamarin
Games like Tamarin include A Hat in Time, Squirrel with a Gun, Ratchet & Clank: Rift Apart, Pumpkin Jack, and Ori and the Will of the Wisps. We matched them by the tags players give Tamarin on Steam (3D Platformer, Action-Adventure, Third-Person Shooter, Collectathon, and Metroidvania): closest matches first, and among equally close ones the better-known games.

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

Squirrel with a Gun
Shared: Third-Person Shooter · Action-Adventure · 3D Platformer

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

Pumpkin Jack
Shared: 3D Platformer · Collectathon · Indie

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

Yooka-Laylee
Shared: 3D Platformer · Collectathon · Indie

Tomb Raider Game of the Year
Shared: Third-Person Shooter · Action-Adventure · Third Person

Hollow Knight
Shared: Metroidvania · Platformer · Indie

Deaths Door
Shared: 3D Platformer · Cute · Action-Adventure

Corn Kidz 64
Shared: 3D Platformer · Collectathon · Action-Adventure

Pseudoregalia
Shared: 3D Platformer · Metroidvania · Platformer

Cavern of Dreams
Shared: 3D Platformer · Collectathon · Action-Adventure

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

TY the Tasmanian Tiger
Shared: 3D Platformer · Collectathon · Platformer

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

Shadow Man Remastered
Shared: Action-Adventure · Platformer · 3D Platformer

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

Supraland
Shared: Metroidvania · 3D Platformer · Exploration

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

Hollow Knight: Silksong
Shared: Metroidvania · Indie · Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · Platformer · Action-Adventure

Chained Together
Shared: 3D Platformer · Platformer · Action-Adventure

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

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