COSM-GAME RELLION: NPC Survival
RELLION: NPC Survival is a free-to-play idle RPG developed and published by DAERI SOFT Inc. Players take on the role of the True Player, returning to Rellion, a once-thriving realm now governed entirely by its non-player characters, and tasked with guiding those NPCs through the threats facing their fading world. Progression centers on recruiting heroes through gacha summons, leveling and equipping them, and advancing through story chapters, dungeons, and multi-boss raids, with characters continuing to grow even while the player is offline. Its defining gameplay centers on formation-based tactical battles, where hero traits and team placement, rather than raw power alone, decide the outcome of encounters.
Game summary
On this page
Latest update
The current version, 1.37.0, is a maintenance release focused on bug fixes and optimization. It follows version 1.36.14, which launched the Assault Battle mode, ran a new rate-up summon event, expanded existing content, and included balance adjustments alongside quality-of-life improvements.
Release date and status
RELLION: NPC Survival launched on May 13, 2026 on the App Store, with the Android release following in the same window. The game has remained in continuous live-service operation since launch, with DAERI SOFT Inc issuing frequent hero, event, and balance updates.
| Global release | May 13, 2026 |
| Original launch platforms | |
| Global status | Released |
| Pricing model | Free-to-play·In-app purchases |
| Availability | Google PlayApp StoreWorldwide |
Platforms and availability
RELLION: NPC Survival is available on iPhone, iPad, and Android phones and tablets. No PC or console version has been announced. The game can be downloaded directly through the App Store or Google Play in supported regions worldwide.
Gameplay and setting
Combat runs primarily on auto-battle, with heroes attacking and moving on their own, though players can step in for more direct control. Team building is central to success: players collect heroes through gacha summons, then arrange them into formations where hero traits and positioning can decide whether a fight is winnable, a system DAERI SOFT Inc describes as refined through roughly 900 design iterations. Outside of battle, players manage an Alchemy Gem growth system that advances heroes even while offline, work through story chapters, dungeons, and multi-boss raids, and complete short daily tasks.
Rellion itself is a once-populated fantasy realm now run entirely by its non-player characters. Players take on the role of the True Player, returning to guide these NPCs through the threats facing their fading world.
Trailer, screenshots, and media
The gallery below includes the official launch trailer alongside screenshots showing team formations, combat encounters, hero summons, and story scenes from RELLION: NPC Survival.
Developer and publisher
RELLION: NPC Survival is developed and published by DAERI SOFT Inc, a South Korea based mobile studio that also operates several other anime-style RPGs and idle games. DAERI SOFT self-publishes the game and continues to operate it as a live service, handling its updates, events, and community channels directly.
| Developer | DAERI SOFT Inc |
| Publisher | DAERI SOFT Inc |
| Official website | RELLION: NPC Survival |
Download and availability
RELLION: NPC Survival can be downloaded for free directly from the App Store on iPhone and iPad, or from Google Play on Android devices. The game is free to install, with optional in-app purchases available for premium currency and other bundles once installed.
System / Device Requirements
Requirements differ by platform. iOS and iPadOS have an official minimum software version, while the Android baseline below reflects current app store listings rather than a developer-published specification sheet.
| iOS / iPadOS specification | Minimum |
|---|---|
| OS | iOS 15.0 or later (iPadOS 15.0 or later on iPad) |
| Storage | 1.3 GB |
| Android specification | Practical minimum |
|---|---|
| OS | Android 7.1 or later |