Games like Cosmic Monsters
Games like Cosmic Monsters include CrossCode, Wolcen: Lords of Mayhem, Evoland, Secrets of Grindea, and To the Moon. We matched them by the tags players give Cosmic Monsters on Steam (RPG, Indie, Adventure, 2D, and Singleplayer): closest matches first, and among equally close ones the better-known games.

CrossCode
Shared: RPG · Action RPG · Indie

Wolcen: Lords of Mayhem
Shared: RPG · Action RPG · Singleplayer

Evoland
Shared: RPG · Indie · Adventure

Secrets of Grindea
Shared: Adventure · Indie · Singleplayer

To the Moon
Shared: Indie · Adventure · Singleplayer

Melvor Idle
Shared: RPG · Indie · Adventure

Swords and Souls: Neverseen
Shared: RPG · Indie · Singleplayer

The World of Kungfu: Dragon and Eagle
Shared: RPG · Indie · Adventure

Bastion
Shared: Indie · RPG · Singleplayer

鬼谷八荒 Tale of Immortal
Shared: Singleplayer · RPG · Adventure

Evoland 2
Shared: RPG · Indie · Adventure

Black Myth: Wukong
Shared: RPG · Action RPG · Singleplayer

Dust: An Elysian Tail
Shared: Indie · RPG · Adventure

Cat Quest
Shared: RPG · Adventure · Indie

Eastward
Shared: Adventure · RPG · Singleplayer

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Singleplayer

Sands of Salzaar
Shared: RPG · Indie · Adventure

Dragon's Dogma 2
Shared: RPG · Action RPG · Singleplayer

Tainted Grail: The Fall of Avalon
Shared: RPG · Adventure · Singleplayer

Finding Paradise
Shared: Adventure · RPG · 2D

Last Epoch
Shared: RPG · Action RPG · Adventure

Nobody Saves the World
Shared: Indie · Singleplayer · Adventure

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

South Park™: The Stick of Truth™
Shared: RPG · Adventure · Singleplayer