《Chaos Zero Nightmare》10月21日上线第五赛季与一周年活动

• Chaos Zero Nightmare Season 5, “Promise Embedded in the Snow,” launches on October 21, 2026.
• The anniversary update introduces new Combatants, Partners, the boss Valtraute, and gameplay improvements.
• You can earn free pulls, Crystals, selection tickets, and more through anniversary events.

Smilegate is celebrating the first anniversary of its roguelike RPG, Chaos Zero Nightmare, with a special update titled Nightmare X Carnival. The celebration brings a fresh Season 5 storyline, new Combatants and Partners, challenging boss battles, gameplay improvements, new costumes, and more anniversary rewards. Season 5, titled “A Promise Upon the Snow,” will arrive on October 21, 2026.

Chaos Zero Nightmare Season 5 introduces a new story

The anniversary update kicks off a new chapter in Galactic Disaster Season 5, titled A Promise Upon the Snow. Set on the frozen planet Nivalis, the story takes you to the crashed ark Front Nova, consumed by Chaos, and transformed into a new area known as Heaven’s Barrier. The Chaos God Dialos rules the region, setting the stage for more revelations about the gods and their connection to Chaos.

You can also experience Chapter 0, Escape from Judgment, ahead of the full Season 5 launch. If you have reached Captain Level 35, you can check the preview story and access it through the event page. Once the preview ends, the chapter becomes part of the main Season 5 story on October 21, 2026.

The update will also introduce new Combatants and Partners, giving you more options to experiment with your decks and team compositions.

1. Rossweisse and Sig

Rossweisse is the featured seasonal Combatant for the first anniversary. A Justice-element Striker and Apostle of the Circulation God Kirken, she uses a unique mechanic called Light and Dark, also known as Myungam.

This ability lets opposing cards merge in her hand, setting up powerful consecutive attacks. Her Partner, Sig, joins her as her self-proclaimed younger sister.

2. Blazebell and Vivian

Blazebell will arrive as the first Combatant from the Slay faction. As a Fire-element Controller, she focuses on the Bond and Purity keywords to support her team, improve AP generation, draw cards, and increase damage output. She is accompanied by Vivian, her Partner.

3. Dahlia and Edelyn

Dahlia is another new Combatant joining the roster, accompanied by her Partner, Edelyn. As a Superior Agent, she makes use of the Bond keyword to combine different card effects into powerful individual attacks.

New boss Valtraute leads the Season 5 challenges

Season 5 will also introduce Valtraute, the judge agent serving Dialos. She takes the spotlight as the season’s main boss, bringing dedicated mechanics that you will need to understand before taking her on. The encounter also features a unique theme track.

Alongside the new seasonal Boss, Full-Scale Offensive returns with a new season featuring three bosses. You must prepare three separate teams, with Combatants used on one battle unavailable for the others. Progress and team formations can be reset individually or together.

Gameplay improvements make deck-building and progression easier

The anniversary update will also introduce several system changes aimed at making preparation and progression more convenient.

Great Rift gets two separate modes

• Subjugation Battles: A lighter experience focused on clearing battles and collecting rewards.
• Conquest Battles: A competitive mode built around scoring and performance.

More combat and deck-building improvements

Other changes include:

• Action Pattern Preview: Bosses’ major attacks and beneficial actions will be previewed.
• Partner exploration passives: Four-star and five-star Partners will gain roguelike deck-building support effects, including credit boosts and increased Burn application chances.
• Memory Shard customization: You can select sub-options when creating shards and use reconstitution to reroll enhanced stat values.
• Simulation Dungeons: The first three weekly runs will be free. Subsequent runs will cost Ether.
• Combat speed: A new option will let you speed up combat animations.
• Profile customization: New titles, portraits, and portrait borders will let you personalize your profiles.

A new item called Aether Cell will be added. Once Aether reaches its maximum capacity, these cells will charge automatically at a certain rate. You can then exchange them for Aether at a 1:1 ratio.

New outfits and card skins expand customization options

The anniversary update introduces Special Grade Outfits, a more comprehensive cosmetic option that goes beyond changing a character’s appearance. Rosweisse will be the first Combatant to receive one. These outfits will update several character visuals, including:

• Character portraits and 3D models.
• Ego Skill and card cut-ins.
• Battle illustrations.
• Voice lines, expanding from two to 46.

The update will also introduce a card skin system covering 16 Combatants in the Midnight Invitation card pack.

Anniversary events offer free pulls, Crystals, and more rewards

The first anniversary brings several activities and giveaways, which are as follows:

• Nightmare Dream Park: This one’s a tycoon-style management mini-game offering rewards like Crystals, Character growth materials, and special emoticons.
• Anniversary giveaway rewards: You can look forward to a range of rewards during the anniversary celebrations, including free Combatant and Partner Selection Tickets, 1,600 Crystaks, 70 Standard pulls, 20 additional Rescue Anchors, and more.
• Guardian Angel’s Vacation: Join Sereniel on a special vacation and experience her story while earning rewards.
• Memoirs of the Ark Protection Bureau Chief: Complete three missions linked to each entry in the new Sereniel memoir.
• Virtual Tactical Simulation: Try out new Combatant Anike through fixed-data trial stages during the respective rate-up periods.
• Overdrive Simulation: Earn double Simulation rewards up to six times per day.

Co-op mode is planned for December

The anniversary celebration is only part of the upcoming roadmap. Smilegate is planning to introduce Operation Core Break, a two-player co-op mode, in December 2026.

The mode will let you tackle boss stages together, with shared rule changes and team-based tactics adding a different dimension to combat. However, the Corruption system has been delayed so the devs can refine it further.

Read other related articles:

• Chaos Zero Nightmare Review: Dive into the Dark Gacha Deck-Builder
• Chaos Zero Nightmare Memory Fragments Guide and how to get them
• Chaos Zero Nightmare: The Complete Equipment Guide
• Chaos Zero Nightmare: Tips to level up quickly in the game
• Chaos Zero Nightmare: The Complete Combat System Guide and Tips

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