Idle Defense: Cosmic TD

Command an ever-evolving battle station in an endless cosmic war! Idle Defense: Cosmic TD blends idle tower defense strategy with deep RPG-style progression — upgrade while you play, and keep earning while you're away.

⚔️ ENDLESS WAVES, EPIC BOSSES
Fend off relentless waves of alien invaders, stealth units and healers. Every 10th wave unleashes a massive boss fight that tests your build.

🎯 TAP TO DEAL DAMAGE
Jump into the action yourself — tap enemies on screen for bonus damage on top of your automated firepower.

🛸 4 PRESTIGE TOWER CLASSES
Specialize your core as a Laser, Sniper, Frost or Tesla tower, each with unique mechanics like chain lightning and freeze fields.

🚀 10-TIER SHIP PROGRESSION
Watch your tower evolve from a humble Scout into a legendary Flagship as you push further, wave after wave.

💥 ACTIVE SKILLS
Turn any battle with Orbital Strike, Time Warp and Overcharge — devastating abilities you control.

🔬 RESEARCH TREES & RELICS
Unlock permanent research upgrades and collect Common to Legendary relics with powerful special effects.

🧩 MODULES, INVENTORY & DRONES
Equip modules to customize your core's playstyle and deploy combat drones to multiply your firepower.

💰 REAL OFFLINE EARNINGS
Your tower keeps fighting even when you're away — come back to a pile of rewards, or double them by watching a quick ad.

📋 DAILY MISSIONS & PRESTIGE
Complete daily missions for bonus rewards, then Prestige for permanent Crystal upgrades that make every future run stronger.

🌍 GUILDS, LEADERBOARDS & LIVE CO-OP RAIDS
Join a guild, climb the global leaderboard, and team up with players worldwide in real-time World Boss raids — every hit counts toward a shared victory.

How many waves can your tower survive? Download Idle Defense: Cosmic TD now and start your ascension.