Chaos Zero Nightmare is a turn-based RPG with cards and roguelike exploration, developed by Super Creative and published by Smilegate. This guide puts together what you need to get into the game now, during the first anniversary and Season 5, which started on October 21, 2026.

What the game is

You build your team with Combatants and Partners and clear stages with cards, in turns. The mode is roguelike, so each exploration can start in a different way, and your decisions change from one run to the next.

Pulls are called Rescues. Rate-up banners put Combatants and Partners on limited time, and outside them the rates are the normal ones. Events include stories, missions and temporary campaigns, announced by the team on STOVE.

When the anniversary runs

The event period goes from October 20 to November 4, 2026. The October 21 update brought Chapter 1 of Season 5 of Galactic Disaster, the new Chaos Celestial Bulwark, the Nebulous Distortion system and the season's supply shop.

Update notes for October 21, with Chapter 1 of Season 5
Update notes for October 21, with Chapter 1 of Season 5

The banner for Rossweisse and Sig, the new seasonal agents, opens on October 21, 2026, right after maintenance, and closes on December 2, 2026. It is a rate-up Rescue, so read the banner before spending anything.

The Rossweisse and Sig rate-up Rescue banner
The Rossweisse and Sig rate-up Rescue banner

The anniversary daily login runs from October 21 to November 3. Every day at 06:00 UTC the game sends gifts to your mailbox, with special rewards on October 21 and October 28. If you cannot log in every day, those two dates are the ones to protect.

First anniversary daily login rewards event
First anniversary daily login rewards event

Codes active right now

These are the codes available at the moment, with what each one gives:

  • EPICWITHCZN: Rescue Anchor x3 and 300,000 Units
  • 10211STANNIVERSARY: 500 Crystals
  • CZNNEWPDGIFT1ST: Signal Amplification Anchor x10
  • CZNNEWPDGIFT2ND: Signal Amplification Anchor x10
  • CZNNEWPDGIFT3RD: Signal Amplification Anchor x10
  • NIGHTMARECARNIVAL: 1,000 Crystals

The deadline for each code is not listed here. Check the official notice before redeeming, and copy the code exactly as it appears.

How to redeem a code

In the game, the path is this:

  • Open your account settings and choose Register Coupon.
  • Type the code and confirm.
  • The rewards arrive in your mailbox.

On the official website, open Register Coupon and enter your account or member number plus the code. Each code has its own deadline, so redeem the valid ones now instead of saving the list for later.

What to do this week

If you just came back to the game, go through these steps in order:

  • Redeem the six active codes and check your mailbox.
  • Log in every day for the anniversary login.
  • Claim the 200 Crystals from maintenance compensation until October 22 at 14:59 UTC.
  • Before updating, deal with the download. After the October 21 update, if the game is closed and reopened without the download starting, the content can reach around 6.8 GB instead of the expected 860 MB. The team is investigating the cause and recommends finishing the download without interruption.

Season 5 Chapter 1, the Chaos Celestial Bulwark and the Nebulous Distortion system all land in the same patch as the new banner, so look at each of them before you commit resources to Rossweisse and Sig.

The comment event asking which god Rossweisse serves is also open. Participants must comment in the format UID / number, and the rewards arrive in the mailbox on November 10.