Ion Warden Grid
Chain lightning tower defense.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Auto-cast lightning skills, upgrade four storm types, and clear 50 levels before the breach.
Ion Warden Grid is a chain-lightning tower defense puzzle. A storm emitter sits at the bottom of the arena. When the charge meter is full, the storm auto-casts an Ion Arc that chains between nearby enemies. Your job is to spend skill points upgrading four storm skills so the automatic lightning can handle every wave.
Each level spawns a set number of minions that descend toward the emitter line. If any enemy reaches the line, the level fails. A boss arrives near the final third of the level — clear every minion and the boss before the timer runs out to win.
Four skills can be upgraded with skill points. Link adds chain targets and extends chain range. Nova triggers a periodic area burst around a target, hitting all enemies within radius. Field creates a horizontal static line that slows and damages enemies passing through it. Rate fires a focused single-target surge that prioritizes the boss, dealing bonus damage to it.
Earn 1 skill point per minion destroyed and a bonus 10 or more for defeating the boss. Starting skill points scale with level. Each skill has 8 upgrade levels with increasing cost, so choose your build carefully — spread points across all four skills or focus on one to maximize its effect.
Features:
- Auto-cast chain-lightning storm that arcs between enemies when the charge meter is full.
- Upgrade four skills: Link (chain targets and range), Nova (area burst), Field (slow line), Rate (boss surge).
- 50 levels with progressive difficulty: 500+ minions per level, boss at 66.7%, 156-240 second timers.
- Five enemy types: Normal, Fast, Tank, Dodger, and Boss — introduced gradually from level 1 to 31+.
- Each skill has 8 upgrade levels with costs from 50 to 540 skill points.
- Watch real-time HUD: score, level, enemies destroyed, charge meter percentage, and skill costs.
- Browse 50 levels in a paginated 3-column grid with LOCKED, OPEN, and DONE states.
- Pause overlay with Resume, Restart, and Menu options.
- Settings panel to toggle Music, Sound Effects, and Haptics.
- Fully offline; progress and settings saved locally on device.
Ratings & Reviews
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The developer, Evans Omondi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Provider
- Evans Omondi
- Size
- 15 MB
- Category
- Casual
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Rosewood Studio