🐳 New! Moby v2023.12.02

Cassette Beasts

Moby ID: 202271

Official Description

Adventure. Battle. Transform.

Collect awesome monsters to use during turn-based battles in this open-world RPG. Combine any two monster forms using Cassette Beasts’ Fusion System to create unique and powerful new ones!

Welcome to New Wirral, a remote island inhabited by strange creatures you’ve only dreamed of, nightmares you hopefully haven’t, and a cast of brave folks who use cassette tapes to transform for battle. To find a way home you’ll need to explore every inch of the island, and record monsters to your trusty cassette tapes to gain their abilities!

Transform into monsters...using retro cassette tapes?!

Faced with the constant threat of monster attacks, the residents of Harbourtown, New Wirral choose to fight fire with fire. Record a monster to tape, then play it back to take on its form for battle!

Fuse monster forms!

Getting close to your companion has benefits–while transformed you can combine your strengths to gain the upper hand in battle! Any two monster forms can be fused to produce unique, fully-animated new fusion forms.

Explore a rich open world

Certain monster abilities can be used in human form. You’ll need these to help you get around, solve puzzles, and locate dungeons. Glide, fly, swim, climb, dash, or turn magnetic!

Travel alongside a diverse cast of human companions

Never fight alone! Form bonds, spend time together, and help your selected partner complete personal goals to become a better team. The strength of your relationship determines how well you’re able to fuse!

Master a deep battle system

Take advantage of elemental chemistry to apply extra buffs or debuffs alongside your attack, or even alter your opponent’s elemental type!

Play couch-co op with Friends

Team up in local multiplayer with a friend to explore an open world, transform and battle together! Facing the unknown as a duo will surely develop your relationship!

Source: Steam Store Description


  • カセット ビースト - Japanese spelling
  • 磁带妖怪 - Simplified Chinese spelling
  • 磁帶怪獸 - Traditional Chinese spelling
  • 카세트 비스트 - Korean spelling

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Credits (Windows version)

210 People (182 developers, 28 thanks) · View all

A game by
  • Bytten Studio
Game Design
Art Direction
Pixel Art & Animation
Character Illustrations
Additional Monster Designs
Raw Fury
[ full credits ]



Average score: 86% (based on 23 ratings)


Average score: 2.0 out of 5 (based on 1 ratings with 0 reviews)

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Contributors to this Entry

Game added by Sciere.

Windows Apps, Nintendo Switch, Xbox One, Xbox Series added by Plok.

Additional contributors: Plok.

Game added April 26th, 2023. Last modified November 13th, 2023.