Games like Mugen Journey
Games like Mugen Journey include ARMORED CORE™ VI FIRES OF RUBICON™, Sonic Frontiers, Kao the Kangaroo: Round 2 (2003 re-release), Crash Bandicoot™ 4: It’s About Time, and Spark the Electric Jester 3. We matched them by the tags players give Mugen Journey on Steam (Action, Casual, Robots, Score Attack, and 3D): closest matches first, and among equally close ones the better-known games.

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Robots · Third Person

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

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

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

Spark the Electric Jester 3
Shared: Action · 3D · 3D Platformer

SONIC X SHADOW GENERATIONS
Shared: Action · 3D Platformer · Platformer

PRAGMATA
Shared: Action · Robots · Action-Adventure

Pumpkin Jack
Shared: Action · 3D Platformer · Indie

Sonic Adventure 2
Shared: Action · Platformer · 3D Platformer

Black Myth: Wukong
Shared: Action · Action-Adventure · 3D

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

Stellar Blade™
Shared: Action · Third Person · Hack and Slash

Chained Together
Shared: Casual · Platformer · 3D Platformer

Toree 2
Shared: Action · 3D Platformer · Platformer

Sonic Adventure DX
Shared: Platformer · Action · 3D Platformer

ENSLAVED™: Odyssey to the West™ Premium Edition
Shared: Action · Robots · Action-Adventure

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

God of War Ragnarök
Shared: Action · Action-Adventure · 3D

STAR WARS Jedi: Fallen Order™
Shared: Action-Adventure · Action · Third Person

FANTASY LIFE i: The Girl Who Steals Time
Shared: Casual · Action · Action-Adventure

ALTF4
Shared: Action · 3D Platformer · Casual

Hi-Fi RUSH
Shared: Action · Action-Adventure · Platformer

Only Climb: Better Together
Shared: 3D Platformer · Platformer · 3D

Solar Ash
Shared: Action · Platformer · 3D Platformer