Idle Defense: Cosmic TD

Idle Defense: Cosmic TD is an idle space tower defense game. Your battle station at the edge of the galaxy fires on its own, wave after wave: you choose the upgrades, tap enemies for bonus damage, and your station keeps earning while you're offline. Short sessions, real progression and always a clear next goal. Earns while closed: up to 24 hours of offline earnings, 48 with the Commander Pass. Ads only when you choose: every ad is an optional video you start for a reward, never a forced pop-up. 🌌 A JOURNEY THROUGH COSMIC SECTORS Every 25 waves is a sector with its own sector boss. Clear it, secure the sector and push into the next one — your journey is always visible on the Base screen. ⚔️ WAVES, BOSSES AND YOUR OWN TAPS Fend off 9 enemy types, from scouts, tanks, healers and shadows to kamikaze crawlers. Every 10th wave brings a boss fight that tests your build — and you can tap enemies for bonus damage on top of your automated firepower. 🎯 A GUIDED START A short guided opening shows you the upgrades that matter and gives you your first chest. No walls of text — you learn by playing. 📅 DAILY, WEEKLY AND LONG-TERM GOALS • Daily Supply Drop: a 7-day reward cycle that never resets you to zero • Login streak with milestone rewards and one free grace day each week • Weekly challenges with three chest tiers • Commander level that grows with everything you do • Enemy Codex: defeat enemy types to unlock permanent damage bonuses 🛸 DEEP PROGRESSION Specialize your core as a Laser, Sniper, Frost or Tesla tower. Unlock research, equip modules, collect relics from Common to Legendary, and Ascend for Crystals that make every future run stronger. 💰 REAL OFFLINE EARNINGS Your station keeps fighting while you're away: up to 24 hours, or 48 hours with the Commander Pass. Come back to your rewards — and double them with an optional ad if you like. 🌍 COMPETE AND COOPERATE Join a guild and rise in the weekly guild ranking by waves cleared, climb the weekly league, and take on timed Rift events with live leaderboards. ✨ PLAY YOUR WAY • Ads are always optional — watch one only when you want its reward • Remove Ads and the Commander Pass are one-time purchases, never subscriptions • Cloud save with your account • Available in 11 languages How far can your station go? Start your journey through the sectors in Idle Defense: Cosmic TD.