ISD: Idle Tower Defense
Server-themed tower defense
Free · Designed for iPad
Build and protect your own digital fortress in Idle Server Defender, a high-depth incremental tower defense game. Face off against relentless waves of viruses and malware as you optimize your server to become an impenetrable powerhouse.
Whether you are a casual fan of idle games or a hardcore strategy player, this game offers endless layers of optimization and math-based progression.
Deep Progression Systems
The game is built around multiple layers of growth that keep every run feeling fresh and rewarding:
- In-Run Upgrades: Use Coins to boost your Attack, Defense, and Utility stats in real time.
- Module System: Spend Bits during your run to activate temporary, high-power Modules across different categories.
- Prestige Upgrades: Reset your levels to earn meta-currency and unlock big boosts in power.
- Gem Upgrades: Invest premium currency into specialized permanent stat boosts that never reset.
- Daemon Protocols: Unlock endgame systems that provide massive stat boosts based on your total gems and highest waves.
Advanced Strategy & Loadouts
Customize your server with 20 unlockable slots to create the perfect build for your playstyle:
- Workers: Assign specialized bots to generate passive Coins, Bits, and Experience while you are active or offline.
- Downloads: Start timed background tasks that provide permanent bonuses once the download completes.
- Executables: Collect and merge rare drops from bosses to stack unique multipliers and rare rarities.
- Boost Cards: Equip powerful cards with 8 different rarity levels to multiply your stats.
- Mechanics: Tweak your game world with tools for Auto-Modules, Wave Time manipulation, and spawn rates.
The Path to Mastery
Push through the breach and see how far your hardware can go:
- 10 Difficulty Cups: Master 10 different cups, each with 10 tiers of escalating rewards and 4x multipliers.
- System Weapons: Unlock high-tier weaponry like the Bit Vortex, Firewall, and Rate Limiter to decimate waves.
- Milestones & Challenges: Reach new heights to claim rewards and climb the global leaderboards.
- True Offline Progress: Your server stays productive even when the app is closed, earning resources for your next session.
Player Friendly Features
- No Forced Ads: Enjoy a clean experience with optional rewards that last twice as long.
- Auto Restart: Perfectly optimized for farming and grinding while you are away.
- Global Leaderboards: Compete for the highest tier achieved against players worldwide.
- Localized Support: Play the game in 10 different languages.
Download Idle Server Defender now and take control of your mainframe!
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
2.4.2
Added some bugfixes and improvements
The developer, Thijs de Rechter, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Thijs de Rechter
- Size
- 176.8 MB
- Category
- Strategy
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 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.
- Languages
- English
- Age Rating
13+
- 13+
- Frequent
Cartoon or Fantasy Violence
Contains
Advertising
- Copyright
- © 2025 Thijs de Rechter