| Core Identity |
| Developer | Hung Nguyen Van | Nekki Games | Touch Foo | Direlight | Nekki Limited | Nekki Limited | 泽阳 李 | Halfbrick Studios | Pandada Games |
| Category | Games | - | Games | Games | - | - | Games | Games | Games |
| Platform | Android, iOS | - | Android, iOS | iOS, Android | - | - | Android, iOS | iOS, Android | iOS, Android |
| Store Metrics |
| Rating | 4.6 / 5 | - | 4.7 / 5 | 4.9 / 5 | - | - | 4.8 / 5 | 4.8 / 5 | 4.8 / 5 |
| Ratings Count | 3,240 | - | 7,677 | 9,710 | - | - | 125,866 | 159,401 | 6,787 |
| Price | Free | - | Free | $5.99 | - | - | Free | Free | Free |
| Release Date | Apr 13, 2017 | - | Mar 22, 2012 | Oct 10, 2018 | - | - | Feb 17, 2017 | Oct 5, 2016 | Dec 13, 2022 |
| Last Updated | Dec 11, 2017 | - | Nov 22, 2023 | Sep 3, 2025 | - | - | Apr 28, 2026 | Jan 16, 2026 | Apr 30, 2026 |
| Sentiment & Reviews |
| Sentiment | positive | - | excellent | - | - | - | negative | positive | mixed |
| Score | 85/100 | - | 92/100 | - | - | - | 35/100 | 79/100 | 55/100 |
| Praises | - Engaging action-adventure gameplay loop provides high replayability for long-term fans of the series
| - | - Nostalgic gameplay loop provides high replay value for long-term users across multiple years
| - | - | - | - Core dungeon crawler gameplay loop remains highly addictive for long-term players
| - Nostalgic Gameplay & Story
- Combat & Controls
| - High-intensity action gameplay and movement mechanics keep players engaged for long-term sessions
|
| Complaints | - Aggressive ad frequency post-update disrupts the flow of the core gameplay experience
| - | - High difficulty spikes in late-game platforming sections frustrate players seeking progression
| - | - | - | - Mandatory internet connection requirements for single-player modes frustrate long-time offline users
| - Intrusive Advertisements
- Purchase & Monetization Issues
| - Aggressive monetization and gacha drop rates create a pay-to-win barrier for competitive progression
|
| Requests | - Paid removal of advertisements to allow for uninterrupted gameplay sessions
| - | - Development of a sequel or second installment to continue the established narrative
| - | - | - | - Reintroduction of a fully functional offline mode for single-player sessions
| - | - Controller support for external hardware to improve precision during high-difficulty boss battles
|
| Strategic Intel |
| Strengths | - Shadow silhouette art style functions as a visual brand moat
- Narrative-driven progression loop sustains high initial engagement
- Offline playability enables consistent usage during travel
| - | - Nostalgic gameplay loop sustains organic retention across multiple years
- Low hardware requirements expand the addressable market to older devices
| - | - | - | - Editors' Choice badge across five markets sustains organic install velocity
- 400+ weapon library functions as a content-depth moat against lighter arcade-shooters
- Multiplayer social loop increases session duration and DAU/MAU ratio
| - Strong established IP from web series
- Unique real-time co-op multiplayer differentiator
- Highly satisfying, easy-to-learn combat mechanics
| - Ink-wash visual identity functions as a brand moat against generic action-runners
- Multiplayer social loops drive DAU/MAU ratio via clan coordination
|
| Weaknesses | - Aggressive ad frequency post-update disrupts gameplay flow
- Technical regressions on modern hardware cause display scaling issues
- Lack of paid ad-free option limits power-user retention
| - | - Late-game difficulty spikes frustrate casual players
- Save data persistence issues reported post-closure
| - | - | - | - Mandatory online connectivity for single-player modes
- Persistent save-data loss on reinstallation
- 0.17★ Android-iOS rating gap
| - Aggressive ad frequency (top user complaint)
- Technical bugs in IAP restoration flow
- Limited player count in co-op compared to rivals
| - Aggressive gacha drop rates create a pay-to-win barrier for competitive progression
- Account-locking policies following refund disputes alienate long-term players
- Technical instability including login failures disrupts the daily active habit
|
| Pricing | freemium | - | freemium | paid | - | - | freemium | freemium | freemium |
| Momentum | Zombie | - | Maintenance | Maintenance | - | - | Active | Maintenance | - |
| Update Cadence | 2 versions, 1 majors/6mo, ~2869d avg | - | 2 versions, ~800d avg | 5 versions | - | - | 5 versions, 5 majors/6mo, ~20d avg | 5 versions, ~39d avg | - |
