Chaos Zero Nightmare 1st Anniversary Update: Free Rewards, New Characters, and Season 5
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The Chaos Zero Nightmare 1st Anniversary is almost here. Smilegate has revealed a large anniversary update with new Agents, free rewards, events, and gameplay changes.
The main update will arrive on October 21, 2026. It will also bring Season 5: A Promise Upon the Snow.
Three new Agents were shown during the anniversary showcase. They are Rossweisse, Blazebell, and Dahlia.
Players can also get free pulls, 5-Star selector tickets, Crystals, and other rewards.
Here is everything we know about the first anniversary so far.
Contents
- Chaos Zero Nightmare 1st Anniversary Release Date
- Chaos Zero Nightmare 1st Anniversary Rewards
- Chaos Zero Nightmare 1st Anniversary Redeem Code
- Season 5: A Promise Upon the Snow
- Rossweisse Joins as a New Limited 5-Star Agent
- Blazebell Arrives in November
- Dahlia Arrives in December
- Nightmare Dream Park Anniversary Event
- Gameplay and Quality-of-Life Updates
- Two-Player Co-op Is Planned for December
- How to Prepare for the 1st Anniversary
- Chaos Zero Nightmare 1st Anniversary FAQ
- Conclusion
Chaos Zero Nightmare 1st Anniversary Release Date
The main anniversary update will launch on October 21, 2026.
Season 5 will begin on the same day. Rossweisse will also get her limited banner when the update goes live.
Here are the main dates:
| Event | Date |
|---|---|
| Anniversary Showcase | October 10, 2026 |
| Anniversary Update | October 21, 2026 |
| Season 5 Start | October 21, 2026 |
| Rossweisse Banner | October 21 – December 2 |
| Blazebell Banner | November 11 – December 2 |
| Dahlia Banner | December 2 – December 23 |
| Anniversary Code Expires | November 9, 2026 |
More update details are also expected before the patch goes live.
Chaos Zero Nightmare 1st Anniversary Rewards
The first anniversary comes with many free rewards.
Players can get Crystals, free pulls, selector tickets, and more. These rewards can help both new and returning players build stronger teams.
The announced rewards include:
- 1,600 Crystals
- One 5-Star Agent Selector Ticket
- One 5-Star Partner Selector Ticket
- 20 Rescue Anchors
- 10 Signal Amplification Anchors
- 70 free Regular Rescues
- 40 Ether per day during the related Cafe event
The selector tickets are some of the best rewards in the event. They give players more control over which 5-Star units they add to their account.
Some rewards may have level or event rules. So, check the in-game event page after the update goes live.
Chaos Zero Nightmare 1st Anniversary Redeem Code
To celebrate the Nightmare Carnival showcase, the developers have released a special coupon code worth 1,000 Crystals.
Reward: 1,000 Crystals
Expires Nov 9, 2026
To redeem the code, open the game's coupon registration option in Settings on supported platforms, or use the official coupon redemption service.
Season 5: A Promise Upon the Snow
The anniversary update will also start Galactic Disaster Season 5.
The new season is called A Promise Upon the Snow.
This chapter takes players to the frozen planet Nivalis. The ark Frontnova has crashed there, and new dangers are waiting.
Season 5 will also add new enemies, cards, gear, and story content.
One of the new major enemies is Agent of Judgment Waltraute.
The new season should also give players more ways to test different decks and team setups.
Rossweisse Joins as a New Limited 5-Star Agent
Rossweisse is one of the biggest highlights of the anniversary update.
She is a limited 5-Star Justice Striker. Her banner starts on October 21.
Her kit uses a new Light and Dark card system.
Some of her cards can appear in Light or Dark forms. These cards can later combine into stronger attacks.
Because of this, Rossweisse may reward careful card use and hand control.
Her signature Partner, Sig, will also arrive with the anniversary update.
Blazebell Arrives in November
Blazebell is another new 5-Star Agent.
She is a Justice Controller and will arrive on November 11, 2026.
Her kit focuses more on support.
She can help with Action Points, card draws, and damage boosts. She also uses Binding and Purity-related effects.
This may make her useful in teams that want to play many cards in a short time.
Dahlia Arrives in December
The third new Agent is Dahlia.
Her banner is planned for December 2, 2026.
Dahlia uses the Binding system.
This mechanic lets players combine card effects and build stronger cards.
More details about her full kit should be shared closer to her release.
Nightmare Dream Park Anniversary Event
The anniversary will also add a new limited event called Nightmare Dream Park.
The event begins on October 21.
Players can build attractions and assign managers. They can then grow their own theme park over time.
The event offers rewards such as Crystals, materials, emotes, and other useful items.
It gives players something different to do outside the usual battle content.
Gameplay and Quality-of-Life Updates
The anniversary patch is not only about new characters.
Several game systems will also get changes.
Memory Fragment Changes
Players will get more control when making Memory Fragments.
The new system will let players choose a main stat and up to two sub-stats.
A new Reconfiguration feature will also allow players to reroll some values.
This should make gear building easier.
Faster Battles
A battle speed option will be added.
This can make daily farming faster and save time during repeat battles.
Partner Improvements
Partners will get new Exploration Passives.
These passives can give useful bonuses during Chaos exploration and Sorties.
Great Rift Changes
Great Rift will be split into two modes.
Subjugation Battle will focus more on clearing fights and learning boss patterns.
Merit Battle will be the more competitive mode.
New weekly missions will also give players more ways to earn rewards.
Two-Player Co-op Is Planned for December
Smilegate also revealed a new multiplayer mode.
It is called Joint Operation: Core Break.
The mode is planned for December 2026.
Two players will be able to team up and fight strong enemies together.
Players can invite friends or use matchmaking.
This will be the first major co-op mode in Chaos Zero Nightmare.
More details should be shared before its release.
How to Prepare for the 1st Anniversary
There are a few simple things you can do before the update.
First, redeem the anniversary code before it expires.
Next, save your pull currency if you want Rossweisse or another new Agent.
It is also a good idea to finish weekly tasks and collect upgrade materials.
Returning players should check their old teams and decks before Season 5 begins.
Finally, watch the official event page for new rewards and time-limited missions.
Chaos Zero Nightmare 1st Anniversary FAQ
When does the Chaos Zero Nightmare 1st Anniversary update start?
The main anniversary update starts on October 21, 2026.
What rewards can players get?
The announced rewards include Crystals, free pulls, Rescue Anchors, and 5-Star Agent and Partner selector tickets.
What is the Chaos Zero Nightmare anniversary code?
The code is NIGHTMARECARNIVAL. It gives 1,000 Crystals.
When does the anniversary code expire?
The code is set to expire on November 9, 2026.
Who are the new anniversary Agents?
The three new Agents are Rossweisse, Blazebell, and Dahlia.
Will Chaos Zero Nightmare add co-op?
Yes. A two-player mode called Joint Operation: Core Break is planned for December 2026.
Chaos Zero Nightmare
Conclusion
The Chaos Zero Nightmare 1st Anniversary brings a lot of new content. Players can look forward to free rewards, new Agents, Season 5, and several gameplay updates.
Rossweisse will lead the anniversary update on October 21. Blazebell and Dahlia will follow later.
There is also more content coming in December, including the game's first two-player co-op mode.
Before the update starts, remember to redeem NIGHTMARECARNIVAL and save your pull currency for the new banners.