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Defense X

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About Defense X

Defense X is a strategy game about humanity’s attempt to survive after dark forces devastate Earth and make it hostile to human life. Survivors set out for distant habitable worlds to rebuild civilization, using technology, warships and tower defenses. You awaken as commander aboard a spaceship orbiting a new world, where strange creatures attack anything in their path.

Lead the defense

You decide where to build and when to attack or defend. Select commanders and turrets for each battlefield, then place defenses at key choke points to protect your headquarters. You collect resources, improve weapons and expand your forces as you hold off alien hordes.

Build your forces

You can build, upgrade and customize defense towers with weapons, and strengthen your fleet by upgrading your spaceship. The battlefields include air, jungle, desert and frozen wastelands, where you adapt your strategies to the enemy and terrain.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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