Your fleet drops onto a red world that already has owners.
Clear the landing zone, raise an electric wall and hold your base against alien swarms of hundreds of bugs, wave after wave, from every side.
BUILD THE DEFENCE
- Gunners, flamethrowers, lasers, cannons and missile launchers, each with its own way to fight
- Every gun fires down its barrel: place turrets where their line of fire is clear
- An electric wall that shocks anything biting it, and outer pads for turrets in front of it
- See a turret's area of control before you place it
HOLD THE LINE
- Swarms of hundreds: skitters, rippers, exploding bursters, spitters, armoured carapaces, fliers and a brood queen
- Big bugs break apart, small ones fly; fire burns, lasers scorch, plasma melts
- Earn metal while you fight, research better turrets and upgrade between waves
THE ARMORY
- Every mission pays Salvage, even a lost one
- 12 power-ups with 25 levels each: gun power, rapid fire, missile boost, double anti-air salvos, beam power, firestorm, slowing rounds, armour, fortress walls, faster harvest, cheaper upgrades and more Salvage
- Hard missions need real power: an armoured brood, a sky full of fliers. Upgrade, come back, win
A CAMPAIGN ON NEW WORLDS
- A prologue and eight missions on the desert world Kessar and the frozen world Velun
- Narrow canyons, a six-turret limit, blizzards, bridges over ice, a relay to defend and two bosses
- Up to three stars per mission
- Last Stand: endless waves, see how long you hold
- Google Play Games achievements
Free to play. An ad shows now and then between missions, never in battle. Reward videos are always your choice: up to 5 Supply Drops a day, double Salvage on any result, and a +5% turret damage boost before a mission. A one-time No Ads purchase removes the between-mission ads. Optional gem packs trade for Salvage or unlock a turret early; everything can also be earned by playing. More worlds are coming in updates.
Mars tower defense: hold the wall against alien swarms.