Games like World Serpent
Games like World Serpent include ALTF4, ATLYSS, Pumpkin Jack, WEBFISHING, and Only Climb: Better Together. We matched them by the tags players give World Serpent on Steam (3D Platformer, Runner, Collectathon, PvE, and Arcade): closest matches first, and among equally close ones the better-known games.

ALTF4
Shared: Runner · 3D Platformer · Arcade

ATLYSS
Shared: Character Customization · 3D Platformer · 3D

Pumpkin Jack
Shared: 3D Platformer · Collectathon · Action

WEBFISHING
Shared: Character Customization · Casual · Collectathon

Only Climb: Better Together
Shared: 3D Platformer · Arcade · Character Customization

Yooka-Replaylee
Shared: 3D Platformer · Collectathon · Arcade

Haste
Shared: 3D Platformer · Runner · Action

Predecessor
Shared: PvE · Third Person · Action

A Hat in Time
Shared: 3D Platformer · Collectathon · Third Person

Disney Speedstorm
Shared: Arcade · Action · 3D

Dead as Disco
Shared: PvE · Arcade · Character Customization

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

Corn Kidz 64
Shared: 3D Platformer · Collectathon · 3D

VHOLUME
Shared: 3D Platformer · Runner · Arcade

Bomb Rush Cyberfunk
Shared: 3D Platformer · Action · 3D

Warhammer 40,000: Space Marine 2
Shared: PvE · Action · Third Person

Yellow Taxi Goes Vroom
Shared: 3D Platformer · 3D · Collectathon

Ding Dong XL
Shared: Runner · Arcade · Character Customization

MONSTER HUNTER RISE
Shared: Character Customization · Action · PvE

Warframe
Shared: Action · Third Person · Character Customization

The Callisto Protocol™
Shared: Horror · PvE · Third Person

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

Hellish Quart
Shared: PvE · Arcade · Character Customization

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