Chaos Zero Nightmare is a deck-building RPG by Smilegate Holdings, available on mobile and PC, where you captain the S.S. Nightmare and battle a sinister black fog called Chaos threatening to consume entire planets. Free Crystals and resources go a long way when you are trying to build the best squad of Protos. This guide covers every active and expired Chaos Zero Nightmare code for April 2026, plus two ways to redeem them.
Active Chaos Zero Nightmare Codes
The Half-Anniversary Showcase: ARISE went live on April 18, 2026, and the developers dropped a celebration code during the stream. Redeem it now as it has a set expiry date.
| Code | Reward | Expiry |
| CZN0418ARISE | 1,000 Crystals | June 30, 2026 |
Important: This code can only be used once per account. You cannot redeem it multiple times, so there is no point in entering it again after your first successful redemption.
Recently Expired Chaos Zero Nightmare Codes
These codes are no longer valid. Entering any of them will result in an error.
| Code | Status |
| BOSSGIFT | Expired |
| CHYUUCHYUUUCHYUU | Expired |
| CZNDECK | Expired |
| CZNDEVGIBYOUSELECTOR | Expired |
| CZNLAUNCH2210 | Expired |
| CZNLAUNCH22ND | Expired |
| CZNSTRESS | Expired |
| CZNTRAUMA | Expired |
| HUGOLOVESYOU1 | Expired |
| HUGOLOVESYOU3000 | Expired |
| HUGOLOVESYOUFOREVER | Expired |
| NOTA5STARSELECTOR | Expired |
What Do Chaos Zero Nightmare Codes Give You?
Chaos Zero Nightmare codes reward players with free in-game resources including Crystals, Support Data, Aether Recharges, Amplification Anchors, and other items that help you summon and upgrade your heroes. These rewards can make a significant difference in how quickly you progress, particularly in the early stages before you unlock the full ship lobby.
Note: Coupon rewards are stored for 30 days after registration, so make sure you collect them from your in-game mailbox promptly after redeeming a code.
How to Redeem Chaos Zero Nightmare Codes
There are two ways to redeem codes in Chaos Zero Nightmare — directly in the game or through the official website. Both methods work equally well, so use whichever is more convenient for you.
In-Game Method:
- Complete the tutorial and reach the Lobby
- Tap the Menu icon (three horizontal lines) in the top right corner
- Select the Settings icon (gear symbol)
- Navigate to Account Settings at the bottom of the left menu
- Tap Register Coupon and enter your code
- Check your in-game mailbox to collect your rewards
Website Method:
- Visit the official Chaos Zero Nightmare code redemption page
- Hover over the top black banner
- Look for the Register Coupon option in the second column, second row
- Click it and enter your code to claim rewards directly
Important: You need to complete the tutorial and reach the ship lobby before you can use any resources you claim. Codes can only be redeemed once per account, so there is no benefit to entering the same code twice.
How to Get More Chaos Zero Nightmare Codes
New Chaos Zero Nightmare codes tend to drop during major game updates, when the game hits player milestones, and during special events and celebrations. The Half-Anniversary is currently active and running through late April 2026, so further codes could still arrive before the celebrations wrap up. The best ways to stay ahead are:
- Join the official Chaos Zero Nightmare Discord server — the announcements channel is where new codes appear first
- Follow the game on X (Twitter), YouTube, Instagram, and Facebook — the developers post code announcements across all platforms during events and updates
- Bookmark this page — the list gets updated as soon as new codes are confirmed
Why Are Your Chaos Zero Nightmare Codes Not Working?
If a code is not going through, the most likely reason is that it has already expired. Chaos Zero Nightmare codes have strict time limits and can stop working quickly. However, a couple of other things are worth checking before giving up:
- Typos — copy and paste codes directly rather than typing them manually to avoid character errors
- Already redeemed — each code works once per account, so if you have used it before, it will not work again
- Server sync — after a major update, give the servers a moment to stabilise before attempting to redeem a new code
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