Comparison

Chaos Zero Nightmare vs メルクストーリア

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. Collect unique cards, develop strategies, and experience a visually stunning world with fully voiced characters. Every playthrough offers a distinct journey through a cosmic disaster.

Highlights
  • Dark fantasy narrative
  • Choice-driven RPG mechanics
  • Unique card collection
  • Evolving 'Save Data'
  • Gorgeous 2D illustrations
  • Fully voiced characters
  • Branching story paths
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

メルクストーリア

Relive a heartwarming story that has touched players for 11 years. This memorial app features the main story, over 80 event stories, and a gallery of units, monsters, and illustrations. Discover new "after stories" for beloved characters.

Highlights
  • Main story archive
  • Over 80 event stories
  • Unit and monster data
  • Illustration gallery
  • New character "after stories"
Read full description

『メルクストーリア - 癒術士と鐘の音色 -』から、メモリアルアプリが登場! あなたの心を感動で癒す温かなストーリーを、いつでもお楽しみください。 11年間にわたりお届けしたメインストーリーや80を超えるイベントストーリーを収録! ギャラリーではユニットやモンスターのデータに加え、ゲームで使用された数多くのイラストなども閲覧できます! また、メモリアルアプリだけの新要素として、あのキャラクターたちの「その後の姿」も収録されています! 心温まり幸せな気持ちになれる優しい世界を、これからもあなたの手の中に。

Screenshots

Chaos Zero Nightmare4 screens
メルクストーリア4 screens

Verdict

The call

The clearest difference is rating: Chaos Zero Nightmare at 4.9 against メルクストーリア's 4.2. Chaos Zero Nightmare also leads on ratings volume (16K vs 5) and chart position (#13 vs unranked). メルクストーリア's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price, device support and iOS requirement 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 10 one-off in-app purchases. メルクストーリア asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chaos Zero Nightmare holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: Chaos Zero Nightmare has 16K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 66% of Chaos Zero Nightmare's written reviews are positive against 95% of メルクストーリア's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Chaos Zero Nightmare ships an update every 3 weeks, メルクストーリア every 4 days. The most recent releases landed on November 12, 2026 and November 8, 2026 respectively.

Scorecard8 real differences · 3 level
Chaos Zero Nightmare versus メルクストーリア: the parameters behind the verdict, then further details
ParameterChaos Zero Nightmareメルクストーリア
PriceFreeFree
Rating4.9 (16K ratings) — better4.2 (5 ratings)
Positive reviews66.5% of reviews95.2% of reviews — better
Number of ratings16K — better5
Update frequencyEvery 3 weeksEvery 4 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#13 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size114 MB203 MB
Age rating12+12+
DeveloperSmilegate, Inc.Happy Elements K.K

Customer experience

Chaos Zero Nightmare

All ratings15,627 ratings
Positive97.2%
Neutral0.7%
Negative2.0%
Written reviews991 reviews
Positive66.5%
Neutral8.0%
Negative25.5%

メルクストーリア

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews21 reviews
Positive95.2%
Neutral0.0%
Negative4.8%

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

メルクストーリア

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Chaos Zero Nightmare

One-time10
  • Crystal ×300$4.99
  • Coronomicon Monthly Package$4.99
  • Tactical Asset Monthly Supply$4.99
Show 7 more
  • Special Data$9.99
  • Crystal ×980$14.99
  • Regular Rescue Operation II$14.99
  • Crystal ×1980$29.99
  • Royal Level Up Package$29.99
  • Crystal ×3280$49.99
  • Crystal ×6480$99.99
None

メルクストーリア

No in-app purchases

Questions

Is Chaos Zero Nightmare free?
Chaos Zero Nightmare is free to download, with in-app purchases available.
Is メルクストーリア free?
メルクストーリア is free to download, with no in-app purchases.
Which has better reviews, Chaos Zero Nightmare or メルクストーリア?
Chaos Zero Nightmare is rated higher. Chaos Zero Nightmare averages 4.9 out of 5 from 16K ratings, while メルクストーリア averages 4.2 from 5 ratings.
Do Chaos Zero Nightmare or メルクストーリア have ads?
Chaos Zero Nightmare shows ads; メルクストーリア does not.
Which is updated more often, Chaos Zero Nightmare or メルクストーリア?
Chaos Zero Nightmare ships an update every 3 weeks, and メルクストーリア every 4 days. Most recently, Chaos Zero Nightmare was updated on November 12, 2026 and メルクストーリア on November 8, 2026.

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