Games like Zoop! - Hunter's Grimm
Games like Zoop! - Hunter's Grimm include Mysteria ~Occult Shadows~, Notes of Soul, Lost, Yokai's Secret, and ICEY. We matched them by the tags players give Zoop! - Hunter's Grimm on Steam (Anime, RPG, Adventure, Indie, and Action): closest matches first, and among equally close ones the better-known games.

Mysteria ~Occult Shadows~
Shared: Anime · Action · RPG

Notes of Soul
Shared: Adventure · Action · Sexual Content

Lost
Shared: Nudity · Sexual Content · Indie

Yokai's Secret
Shared: Indie · Nudity · Anime

ICEY
Shared: Anime · Action · Adventure

The Chosen RPG
Shared: Anime · RPG · Adventure

Sins Of The Demon RPG
Shared: Anime · RPG · Adventure

The Initial
Shared: Anime · Action · Adventure

Seek Girl Ⅲ
Shared: Indie · RPG · Nudity

Seek Girl Ⅳ
Shared: Indie · Nudity · Anime

The Vagrant
Shared: RPG · Action · Adventure

DRAGON BALL Z: KAKAROT
Shared: RPG · Anime · Action

Summer Memories
Shared: Anime · Nudity · Sexual Content

Bloodstained: Ritual of the Night
Shared: RPG · Anime · Adventure

Dungeon Munchies
Shared: Indie · Adventure · Action

Blue Protocol: Star Resonance
Shared: Anime · Adventure · Action

Dragon Spear
Shared: RPG · Action · Adventure

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

Wuthering Waves
Shared: Anime · RPG · Action

SWORD ART ONLINE Alicization Lycoris
Shared: RPG · Anime · Adventure

LEWDAPOCALYPSE Hentai Evil
Shared: Nudity · Sexual Content · Action

Bloody Spell
Shared: Nudity · Sexual Content · RPG

OMON Simulator
Shared: RPG · Nudity · Indie

AKIBA'S TRIP: Undead & Undressed
Shared: Anime · RPG · Nudity