# Sector Defense > The aliens took the world. You hold the line, one sector at a time. Sector Defense is a free sci-fi tower defense game for iPhone and Android with a roguelike upgrade draft. You play the marine on the front line: move left and right to shoot forward while combat drones fight beside you, pick new tech as the alien swarm closes in, and take back 50 sectors across four biomes. - Store name: Sector Defense: Roguelike TD - Developer and publisher: NOXGAMES s.r.o. (https://noxgames.com) - Launch: September 30, 2026 (Google Play) - Platforms: Android 7.1 or later (Google Play); iPhone and iPad, iOS 15 or later (App Store) - Genre: Tower defense, Roguelike, Sci-fi shooter, Strategy - Price: Free, with optional in-app purchases and ads - Orientation: Portrait - Languages: English, Czech, German, Spanish, French, Japanese, Korean, Polish, Portuguese (Brazil), Russian, Turkish, Ukrainian, Vietnamese - Content: 50 campaign sectors in 4 biomes, Heroic mode, 17 heroes - Google Play: https://play.google.com/store/apps/details?id=sector.tower.defense.roguelike.alien.survival - App Store: coming soon - Support: support@noxgames.com, https://sector-defense.com/support ## The story > When they came, everything changed in just a few moments. > > I watched our cities fall as the enemy took over our world. > > We needed an advantage. So we built combat drones. > > We know which places we need to take back. > > Now the sector defense begins. And I'm on the front line. ## How a run works - **Hold the line.** The swarm comes down the sector toward your wall. Move left and right and your marine shoots forward; the Sentinel drone fires alongside on its own. - **Pick your tech.** Kills fill your XP. When it's full, the fight pauses on a Tech Choice: a new drone weapon, an upgrade, or an elite tech that changes how a weapon fires. Spend Dice to reroll the offer. - **Take the sector.** Survive every wave and the sector is yours. Your hero, gear and research carry over to the next sector, and the map pushes on. ## Arsenal Main weapons for your marine: - **Assault Rifle:** Rapid-fire rifle effective against all enemy types. Your starting weapon. - **Pyroblast:** Rocket that explodes at the first enemy and can apply Burn. Aimable. - **Voidpiercer:** Massive void projectile that penetrates enemies. Aimable. - **Vulcan:** High-speed rotating cannon, a continuous storm of bullets. - **Lancerion:** Main laser built for extreme penetration and precision. Drone weapons, drafted during a run: - **Autogun:** Rapid fire - **Hellfire:** Explosive burn - **Venom:** Slow and vulnerable - **Railgun:** Paralyzes enemies - **Void Wave:** Push and disruption - **Plasma Lance:** Precision beam - **Ricochet:** Bouncing shots - **Chainlight:** Ricochet shock - **Linebreaker:** Piercing beam - **Thunderstrike:** Area shock - **Bulletstorm:** Rapid spread - **Gas Cloud:** Toxic slow zone - **Rift Orb:** Piercing rebound - **Longshot:** Single-target specialist - **Hornet:** Homing rockets Damage elements: Metal, Fire, Electric, Toxic, Void, Plasma. ## Hostiles - **Skitter** (Light): A small, fast creature that attacks in large numbers. - **Shrike** (Light): A swift flying predator that attacks from the air. - **Blister** (Light): An unstable creature that explodes upon reaching the base. - **Spitter** (Medium): Attacks from range by launching toxic projectiles. - **Reaver** (Medium): A resilient predator with balanced speed and durability. - **Burrower** (Medium): Burrows underground, becoming untargetable while moving beneath the surface. - **Screecher** (Medium): Lets out a piercing cry before surging forward at increased speed. - **Crusher** (Heavy): A massive, durable creature capable of absorbing heavy fire. - **Leviathan** (Heavy): A heavily armored flying creature that attacks from the air. - **Broodworm** (Heavy): Emerges from underground and continuously releases Skitters until destroyed. - **Spinecaster** (Elite): An elite ranged predator that launches deadly biological projectiles. - **Matriarch** (Elite): An elite breeder that releases a swarm of Skitters upon death. - **Mordax** (Boss): A colossal armored beast that tears through defenses with its massive tusks. - **Vorgath** (Boss): A towering brute that crushes defenses with devastating melee attacks. ## The squad - **Heroes.** A roster of 17 heroes, each tied to an element. Raise their star level with Hero contracts. - **Gear and gems.** Armor, helmet, belt, pants, gloves and boots. Gems socket into gear and merge into stronger ones. - **Artifacts.** Relics like the Plague Mask, the Lucky Paw, the Photon Core and the Titan Heart, each a permanent bonus. - **Walls.** Seven perimeter walls, from the colonial Ironhold to the forbidden Void tech of the Nullgate. Heroes include Garrick Voss, Rin Asakura, Vyxa Thorne, Nadia Kessler, Mei Okonawa, S.M.I.L.E., Julian Reyes, Aiden Marsh, Otto Reinholt, Marcus Kade, Kael Thorne, Rico Alvarez, Freya Ashgard. ## The campaign 50 sectors across 4 biomes: - **Desert** (Sectors 1 to 10): Defend the desert area. - **Green Forest** (Sectors 11 to 20): Patrol the wide nature. - **City** (Sectors 21 to 30): Protect valuable resources. - **Arctic** (Sectors 31 to 40): Defend the citizens of the Arctic zone. - **Heroic mode.** All 50 sectors again, harder, for players who cleared the campaign. - **Gas Tunnels.** Clear the areas and destroy the nests for rare resources. The insects get stronger as you go, and the Brood Colossus lives down there. - **Daily challenges.** Fresh challenge stages every day, plus leaderboards for enemies slain and tunnel progress. - **Events and passes.** Rotating events and a Battle Pass with their own reward tracks. ## Your base - **Energy Core:** Energy is processed here. You can't go on a mission without it. - **Crystal Mine:** Processes the crystals that enhance your equipment. - **Gas Processing:** Refines raw gas, the upgrade material for your defense. - **Gold Mine:** Extracts and processes gold. - **Laboratory:** Runs the Research Tree between missions. - **Command Center:** Dispatches your hero on special challenge missions. Your base keeps mining while you're away: resources pile up offline, up to the maximum mining time, and wait for you to collect them. Auto-pick tech and auto next sector let the game play on when you'd rather watch. If you like tower defense, roguelike survivors, alien-swarm sci-fi or RTS marines holding a choke point, Sector Defense sits where those overlap. ## Frequently asked questions ### What is Sector Defense? Sector Defense is a free mobile tower defense game with a roguelike upgrade draft, set in a sci-fi war against an alien swarm. You play the marine on the front line of a sector: move left and right to shoot forward, fight beside combat drones, and pick new tech between enemy pushes. It is made by NOXGAMES for Android and iOS. ### When does Sector Defense come out? Sector Defense launches on Google Play on September 30, 2026. It is built for iPhone and iPad as well. ### Is Sector Defense free to play? Yes. The campaign is free to play. The game has optional in-app purchases and ads. ### Which phones does it run on? Android phones and tablets running Android 7.1 or later, and iPhone and iPad running iOS 15 or later. It plays in portrait. ### How is it different from other tower defense games? You don't place towers and watch. You are the defender: your marine moves along the line and shoots forward, drones fire alongside, and the weapons you fight with arrive mid-run as Tech Choices. Every run builds a different loadout, and element matchups matter more than placement. ### What are the aliens? The swarm ranges from Skitters that attack in large numbers and flying Shrikes to Burrowers that go untargetable underground, Broodworms that keep spawning Skitters, and elite Matriarchs and Spinecasters. The bosses are Mordax, a colossal tusked beast, and Vorgath, a towering brute. ### How many levels are there? The campaign has 50 sectors across four biomes: desert, green forest, a ruined city and the arctic. Heroic mode replays all 50 at a higher difficulty, and the Gas Tunnels and daily challenges add more. ### Which weapons can I use? Your marine carries a main weapon: Assault Rifle, Pyroblast, Voidpiercer, Vulcan or Lancerion. Drone weapons arrive during the run, including Autogun, Hellfire, Venom, Railgun, Void Wave, Plasma Lance, Chainlight, Linebreaker, Thunderstrike, Bulletstorm, Gas Cloud, Rift Orb, Longshot and Hornet. ### Does Sector Defense work offline? Your base keeps mining resources while the game is closed, up to the maximum mining time, and they're waiting when you come back. ### Is there PvP? No. Sector Defense is a single-player game, with leaderboards for things like enemies slain and Gas Tunnels progress. ### What languages is it in? 13 languages: English, Czech, German, Spanish, French, Japanese, Korean, Polish, Portuguese (Brazil), Russian, Turkish, Ukrainian, Vietnamese. ### Who makes Sector Defense? Sector Defense is developed and published by NOXGAMES s.r.o., an independent mobile game studio based in Prague, Czech Republic. ### How do I contact support or report a bug? Use the support form on the Support page or email support@noxgames.com. Include your player ID if you have it, so the team can find your account faster. --- Last updated 2026-09-29. Canonical page: https://sector-defense.com/