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On Xeno Tactic, your mission is to defend a critical research team base from your bunker during an alien invasion. Therefore, for this you need to go to the construction screen between the waves to upgrade all your buildings and weapons that you have in your possession. Here you need to keep in mind that entire humanity is depending on you for beating back the alien hordes. As you build up your base camp and research alien technology secretly in a quest in order to find a weapon that is capable of defending the alien.

Use your mouse button to aim and shoot. On the other hand, you can use keys 0-9 from your keyboard number keys for choosing your weapon that you want to use against the alien invasion in the game. Further, you can also use the 'Q' key in order to go through all the weapons that you have in your possession. Finally, you can press the 'A' key from your keyboard to fire your artillery and try to keep the alien at bay as far as possible.

 

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