Slot: Semiconductor Defense
Slot tower defense, 40 waves
$1.99 · Designed for iPad. Not verified for macOS.
Spin the slots, draw units, and defend the semiconductor factory.
One-time purchase, full content forever. No ads, no IAP.
A serious slot tower defense — 40 waves × 7 difficulties.
▶ Core Mechanics
Slot Machine
- Collect coins, spin the slots, and acquire units
- 5 grades: Common · Uncommon · Rare · Unique · Legendary — 29 units total
- Slot costs stack up within a run — balance risk and saving
Grid Placement
- 12×7 grid, S-shaped loop path
- 4 attack types: Single · AOE · Pierce · Support
- Combine 3 of the same unit → upgrade to higher grade (17 recipes)
40 Waves × 7 Difficulties
- From Intern (Easy) to Director (Very Hard)
- Diverse enemy gimmicks — Dash · Split · Shield · Phase · Aura Heal
- Boss waves at 10, 20, 30, 40
Permanent Upgrade System (3 layers)
- Meta Tree — Global upgrades (all units/enemies/economy)
- Grade Upgrade — per-race × grade (within a run)
- Unit Upgrade — individual unit permanent leveling (max Lv 20 + milestone bonuses)
▶ Features
- One-time purchase — no ads, no IAP, no subscription
- Landscape mobile optimized
- One run ~30 minutes — finishable on a short commute or break
- Offline play — no network required
▶ Credits
Music by Kevin MacLeod (incompetech.com), CC BY 4.0
SFX by Kenney (kenney.nl), CC0
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- New Legendary support unit "Liquid Cooler" (ally buffs + enemy slow/freeze + frost area damage)
- Fixed "update required" loop that blocked play even on the latest version
- Reduced device heating during play
The developer, Taewoo Kim, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Taewoo Kim
- Size
- 40.3 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 FactoryJam
