Games like Primal Planet
Games like Primal Planet include Ori and the Will of the Wisps, Broforce, Momodora: Reverie Under The Moonlight, Hollow Knight, and Terraria. We matched them by the tags players give Primal Planet on Steam (Dinosaurs, Emotional, Metroidvania, Local Co-Op, and Exploration): closest matches first, and among equally close ones the better-known games.

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

Broforce
Shared: Pixel Graphics · Local Co-Op · Action

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · Exploration · Pixel Graphics

Hollow Knight
Shared: Metroidvania · Exploration · Platformer

Terraria
Shared: Pixel Graphics · Crafting · Exploration

ANIMAL WELL
Shared: Metroidvania · Exploration · Pixel Graphics

Prince of Persia The Lost Crown
Shared: Metroidvania · Exploration · Action

Hollow Knight: Silksong
Shared: Metroidvania · Exploration · Indie

Axiom Verge
Shared: Metroidvania · Pixel Graphics · Action

Skul: The Hero Slayer
Shared: Pixel Graphics · Action · Metroidvania

Rain World
Shared: Exploration · Pixel Graphics · Metroidvania

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · Action · Exploration

Constance
Shared: Metroidvania · Action · Emotional

Haiku, the Robot
Shared: Metroidvania · Exploration · Pixel Graphics

Rabi-Ribi
Shared: Metroidvania · Exploration · Pixel Graphics

Blasphemous 2
Shared: Metroidvania · Pixel Graphics · 2D Platformer

Bloodstained: Ritual of the Night
Shared: Metroidvania · Action · Exploration

Touhou Luna Nights
Shared: Metroidvania · Exploration · Platformer

Souldiers
Shared: Metroidvania · Pixel Graphics · Action

The Messenger
Shared: Metroidvania · Pixel Graphics · Platformer

Gato Roboto
Shared: Metroidvania · Pixel Graphics · Action

Owlboy
Shared: Pixel Graphics · Metroidvania · Platformer

Blasphemous
Shared: Metroidvania · Pixel Graphics · Action

HAAK
Shared: Metroidvania · Pixel Graphics · Platformer