Chaos Zero Nightmare's official Japanese livestream aired on October 21, 2025, ahead of the global launch. The event featured key announcements including the first pickup banner, launch rewards, gameplay guides, and developer insights.
The game launches globally on October 22, 2025, at 3:00 UTC, with pre-download starting October 21, 2025, at 3:00 UTC. Players can access it on PC via STOVE client, Android, and iOS.
Launch rewards include 300 Crystals as an eve gift (claimable from launch to November 30, 2025, 14:59 UTC) and 500 Crystals from the Director's Gift in the Developer's Letter (same period). The Developer's Letter from Director Kim Hyung Suk discusses game development, feedback improvements, and upcoming features like Trauma Code multi-ending stories, starting with Haru's episode.
The first pickup banner features 5-star character Haru (Justice Striker, VA: Hina Youmiya), a frontline combatant balanced in offense and defense. Her mechanics include Anchor Shot that ramps up power with stacks, paired with Anchor Point and Quick Lift for max damage. Power Charge handles multiple enemies but excels on singles.
Mika, a 4-star character, is available for free, providing shielding and cost reduction support. Recommended teams with Haru include:
- Haru + Mika + Erica (Action Point gain, matching attribute synergy)
- Haru + Mika + Celestia (Action Point gain, Celestial card synergy)
- Haru + DJ + Skull (Card cost reduction, faster deck cycling)
Additional content includes a Chaos Guide video explaining exploration, combat, and systems, plus PC installation guide. Giveaways and collaborations are ongoing on official channels.