Games like Monster Seek Ep.1
Games like Monster Seek Ep.1 include Hollow Knight, GRIS, Hollow Knight: Silksong, Nine Sols, and Ori and the Will of the Wisps. We matched them by the tags players give Monster Seek Ep.1 on Steam (Adventure, 2D, Platformer, Hand-drawn, and Linear): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · 2D · Adventure

GRIS
Shared: Adventure · Hand-drawn · Platformer

Hollow Knight: Silksong
Shared: 2D · Platformer · Singleplayer

Nine Sols
Shared: 2D · Platformer · Hand-drawn

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Singleplayer

Stray
Shared: Adventure · Singleplayer · Cute

LIMBO
Shared: Platformer · 2D · Adventure

Celeste
Shared: Platformer · 2D · Adventure

Machinarium
Shared: Hand-drawn · 2D · Adventure

BEEP
Shared: Adventure · Platformer · 2D

Constance
Shared: 2D · Platformer · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · 2D · Adventure

Dead Cells
Shared: Adventure · 2D · Platformer

Thank Goodness You're Here!
Shared: Adventure · Hand-drawn · 2D

Yoku's Island Express
Shared: Adventure · Platformer · Singleplayer

Ratchet & Clank: Rift Apart
Shared: Adventure · Singleplayer · Platformer

Carto
Shared: Adventure · Hand-drawn · Cute

The Purring Quest
Shared: Platformer · 2D · Adventure

Wonder Boy: The Dragon's Trap
Shared: Adventure · Platformer · 2D

Out There Somewhere
Shared: Platformer · Adventure · 2D

MO:Astray
Shared: Adventure · Platformer · 2D

Slime Rancher
Shared: Adventure · Cute · Singleplayer

Spyro™ Reignited Trilogy
Shared: Adventure · Platformer · Singleplayer

Cuphead
Shared: Platformer · 2D · Hand-drawn