Games like Ruffy and the Riverside
Games like Ruffy and the Riverside include Sonic Frontiers, A Hat in Time, Portal 2, Yooka-Laylee, and Pumpkin Jack. We matched them by the tags players give Ruffy and the Riverside on Steam (3D Platformer, Action, Collectathon, Open World, and Platformer): closest matches first, and among equally close ones the better-known games.

Sonic Frontiers
Shared: 3D Platformer · Open World · Action

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

Portal 2
Shared: Platformer · 3D Platformer · Funny

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

Pumpkin Jack
Shared: Action · 3D Platformer · Collectathon

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

Supraland
Shared: Exploration · Puzzle Platformer · 3D Platformer

Rise of the Tomb Raider™
Shared: Action · Open World · Adventure

Crimson Desert Enhanced
Shared: Action · Open World · Exploration

SpongeBob SquarePants: The Cosmic Shake
Shared: 3D Platformer · Action · Platformer

Psychonauts
Shared: Platformer · Action · 3D Platformer

Marvel’s Spider-Man Remastered
Shared: Action · Open World · Action-Adventure

Chained Together
Shared: Platformer · 3D Platformer · Adventure

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

STAR WARS Jedi: Fallen Order™
Shared: Open World · Action-Adventure · Action

SpongeBob SquarePants: Titans of the Tide
Shared: 3D Platformer · Action · Platformer

Hob
Shared: Action · Platformer · Open World

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: 3D Platformer · Action · Adventure

Slime Rancher
Shared: Open World · Exploration · Adventure

Portal
Shared: 3D Platformer · Puzzle Platformer · Action

Human Fall Flat
Shared: Funny · Action · Open World

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

STAR WARS Jedi: Survivor™
Shared: Action · Open World · Action-Adventure

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