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Slot: Semiconductor Defense

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