The monster goes onto a cassette, and playing it back changes you. Cassette Beasts is an open-world RPG for iPhone in which people transform into recorded creatures for turn-based battles. A companion's form can combine with yours through fusion. I find that a more interesting reason to collect another creature than filling an empty entry in a catalogue: its value also depends on what it can become alongside another form.
Explore New Wirral, record creatures and use their abilities to reach places that were previously inaccessible. Human companions have goals of their own, and your relationship influences fusion, while the creatures you record supply abilities for both battles and movement around the island. Elemental interactions can apply status effects or even change an opponent's type, giving you another reason to examine the result of an attack instead of reading damage alone.
Raw Fury describes the original game's recording and fusion systems; its mobile listing adds an important hardware qualification. Memory can limit a session. The listing warns of possible crashes on several devices, including the standard iPhone 12 and iPhone 13. For iPhoners keeping an older handset, I'd check that warning before relying on the minimum iOS version alone. Praise doesn't cancel that hardware warning.
