Comparison

Chaos Zero Nightmare vs Cassette Beasts

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Chaos Zero Nightmare

Embark on a dark fantasy RPG adventure where your choices shape the narrative and gameplay. Battle cosmic horrors with unique cards and evolving strategies. Experience a visually stunning world with fully voiced characters.

Highlights
  • Dark fantasy narrative
  • Choice-driven RPG mechanics
  • Unique card-based combat
  • Evolving gameplay with branching choices
  • Gorgeous 2D illustrations
  • Fully voiced characters
Features
Read full description

Zero Out All Despair Smilegate's new title, "Chaos Zero Nightmare," is now open! Board the SS Nightmare now! Chaos. A cosmic disaster that struck without warning. "Chaos," a black fog that consumes planets, distorting their environment and lifeforms. The beginning, or the end, of every story. [The Blue Pot], a Chaos located on Earth, the birthplace of humanity. There have been reports of unidentifiable creatures being discovered. And for some reason, a strange phenomenon that couldn't—no, shouldn't—be happening to the Captain is occurring. ▶ A World Drenched in Darkness, A Story Etched in Memory Dive into a vast and haunting dark fantasy narrative! Crushing stress, collapsing agents... and yet, the mission continues. Break through the encroaching crisis and immerse yourself in a brutally vivid dark fantasy experience. ▶ A New Kind of RPG, Rewritten with Every Choice Aim through the agents' eyes and feel the weight of combat at your fingertips! Unique cards, branching choices, and evolving "Save Data" shaped by your journey through the Chaos. Every run is unique. Build your own strategy and master the ever-changing battlefield. ▶ Characters That Dazzle the Eyes and Steal the Heart Gorgeous 2D illustrations and striking animations make every moment a visual delight! Fully voiced by top-tier voice actors, each scene draws you deeper into the story. Join a cast of unforgettable characters in battle and beyond, and cherish every moment of your journey together! ※ How to Manage Permissions After allowing access to permissions, you can reset or turn off them as follows. - Device Settings > Privacy & Security > Select the App > Allow or Don't Allow Permissions ⁜⁜Stay up to date with the latest news on Chaos Zero Nightmare! ⁜⁜ Brand Page: https://chaoszeronightmare.onstove.com/ Official Community: https://page.onstove.com/chaoszeronightmare/en Official YouTube: https://www.youtube.com/@ChaosZeroNightmare_EN Official X: https://x.com/CZN_Official_EN

About

Cassette Beasts

Explore a mysterious island, collect and fuse monsters using cassette tapes to transform for turn-based battles. Solve puzzles and uncover secrets with human companions in this open-world RPG.

Highlights
  • Monster collection
  • Monster fusion system
  • Turn-based battles
  • Open-world exploration
  • Transform into monsters
  • Elemental chemistry system
Features
Read full description

*NOTICE* Play the beginning for free. A one-time in-app purchase unlocks the full game. No ads. PLEASE NOTE: Due to RAM restrictions on older devices, you may experience game crashes on: Standard model iPhone 12 and 13, iPhone XS, XR, iPhone SE 2nd gen, iPad 7th, 8th and 9th generations and iPad mini 5th gen. All iPhone Pro versions and iPad Pro versions are supported in full. 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!

Screenshots

Chaos Zero Nightmare4 screens
Cassette Beasts3 screens

Verdict

The call

The clearest difference is rating: Chaos Zero Nightmare at 4.9 against Cassette Beasts's 3.8. Chaos Zero Nightmare also leads on ratings volume (15K vs 462) and review sentiment (66% vs 51%). Cassette Beasts's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Chaos Zero Nightmare sells 51 one-off in-app purchases and Cassette Beasts sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Chaos Zero Nightmare holds the better App Store score, 4.9 against 3.8. That said, the two scores are not equally well evidenced: Chaos Zero Nightmare has 15K ratings behind it against 462, so its average is the more settled of the two. Written reviews point the same way: 66% of Chaos Zero Nightmare's written reviews are positive against 51% of Cassette Beasts's.

UpkeepUpdate frequency

Chaos Zero Nightmare ships an update every 3 weeks, Cassette Beasts monthly. Both last shipped on October 28, 2026.

Scorecard6 real differences · 5 level
Chaos Zero Nightmare versus Cassette Beasts: the parameters behind the verdict, then further details
ParameterChaos Zero NightmareCassette Beasts
PriceFreeFree
Rating4.9 (15K ratings) — better3.8 (462 ratings)
Positive reviews66.3% of reviews — better51.0% of reviews
Number of ratings15K — better462
Update frequencyEvery 3 weeks — betterMonthly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#27 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size113 MB741 MB
Age rating12+9+
DeveloperSmilegate, Inc.Raw Fury

Customer experience

Chaos Zero Nightmare

All ratings15,219 ratings
Positive97.2%
Neutral0.7%
Negative2.0%
Written reviews969 reviews
Positive66.3%
Neutral8.2%
Negative25.6%

Cassette Beasts

All ratings462 ratings
Positive66.2%
Neutral10.4%
Negative23.4%
Written reviews486 reviews
Positive51.0%
Neutral14.6%
Negative34.4%

User reviews

Chaos Zero Nightmare

From 15K App Store ratings

What we love

  • 🚀 Amazing, Incredible, Gorgeous, Uniquely Compelling
  • 👍 Fun, Refreshing, Engaging Gameplay
  • 💎 Solid Story, Animation, and Voice Acting
  • 🎨 Beautiful Character Designs and Visuals

Room to improve

  • 🐛 Connection Issues, Login Problems, and Crashes
  • 💰 Gacha Rates are Low, Grindy Progression
  • ⏱️ Lengthy, Tedious, and Time-Consuming Runs

Cassette Beasts

From 462 App Store ratings

What we love

  • 👍 Unique styling
  • 🚀 Smooth gameplay
  • 💡 Interesting fusion mechanics
  • 👍 Great soundtrack and visuals
  • 👍 Well-made mobile port

Room to improve

  • 🐛 Frequent crashes
  • 🐛 Compatibility issues on older devices
  • 🐛 Buggy controller support
  • 🔒 No cloud save/cross-device support
  • 💰 Paid full version after demo

Bugs and requests

Chaos Zero Nightmare

Reported bugs

2 issues
  • Banned IP Issues
  • Missing Files and Inability to Load

Requested features

3 requests
  • English Dubbed Version
  • More Male Characters
  • Flexible Character Setup

Cassette Beasts

Reported bugs

5 issues
  • Crashes after battles
  • Crashes when exiting demo
  • Stickers not working as intended
  • Bootleg monsters not changing colors
  • Teleportation issues in certain areas

Requested features

5 requests
  • Add cloud save/cross-device support
  • Improve controller support and customization
  • Add more post-game content and replayability
  • Optimize for older/lower-end devices
  • Add Russian language localization

In-app purchases

51 purchases

Chaos Zero Nightmare

One-time51
  • New Captain Support Kit I$0.99
  • New Captain Support Kit II$4.99
  • Coronomicon Monthly Package$4.99
Show 48 more
  • Half-Anniversary Ticket$4.99
  • Tactical Asset Monthly Supply$4.99
  • Agent Growth Kit$4.99
  • Aether Supply Kit$4.99
  • Angel on the White Sands$7.99
  • Gentle Ripples on the Night Sea$7.99
  • Crimson Yearning Within the Waves$7.99
  • Youth Under the Sun$7.99
  • Special Data7 variants$9.99
  • Partner Promotion Kit$9.99
  • Nightmare Carnival Chest I$14.99
  • Imp's Mischief I$14.99
  • Covert Exchange I$14.99
  • Scent of Summer I$14.99
  • Legacy of Will I$14.99
  • Galaxy Melody I$14.99
  • Emergency Rescue Operation II$14.99
  • Crystal ×980$14.99
  • Regular Rescue Operation II$14.99
  • Golden Nebula Package I$14.99
  • SS Nightmare Security Upgrade I$14.99
  • Budding Seed of Karmic Fire I$14.99
  • Zero Data7 variants$19.99
  • Golden Glow Beneath the Night Sky$29.99
  • Crystal ×1980$29.99
  • Royal Level Up Package$29.99
  • Golden Nebula Package II$29.99
  • Sweet Confession Gift$29.99
  • Galactic Disaster 3rd Supply Kit II$29.99
  • Emergency Rescue Operation III$29.99
  • Crystal ×3280$49.99
  • Nightmare Carnival Chest II$49.99
  • Imp's Mischief II$49.99
  • Covert Exchange II$49.99
  • Scent of Summer II$49.99
  • Legacy of Will II$49.99
  • Galaxy Melody Ⅱ$49.99
  • SS Nightmare Security Upgrade II$49.99
  • Silver Winter Star Package I$49.99
  • Galactic Disaster Support Kit I$49.99
  • Large Scale Rescue Operation I$49.99
  • Nightmare Carnival Chest III$99.99
  • Imp's Mischief III$99.99
  • Covert Exchange Ⅲ$99.99
  • Scent of Summer III$99.99
  • Galaxy Melody Ⅲ$99.99
  • Crystal ×6480$99.99
  • Golden Nebula Package Ⅳ$99.99
3 purchases

Cassette Beasts

One-time3
  • Cosplay Pack$0.99
  • Pier of the Unknown$2.99
  • Unlock the full game$6.99

Questions

Is Chaos Zero Nightmare free?
Chaos Zero Nightmare is free to download, with in-app purchases available.
Is Cassette Beasts free?
Cassette Beasts is free to download, with in-app purchases available.
Which has better reviews, Chaos Zero Nightmare or Cassette Beasts?
Chaos Zero Nightmare is rated higher. Chaos Zero Nightmare averages 4.9 out of 5 from 15K ratings, while Cassette Beasts averages 3.8 from 462 ratings.
Do Chaos Zero Nightmare or Cassette Beasts have ads?
Chaos Zero Nightmare shows ads; Cassette Beasts does not.
Which is updated more often, Chaos Zero Nightmare or Cassette Beasts?
Chaos Zero Nightmare ships an update every 3 weeks, and Cassette Beasts monthly. Most recently, Chaos Zero Nightmare was updated on October 28, 2026 and Cassette Beasts on October 28, 2026.

Other comparisons