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Conquer Zombie Squad to survive! 5 heroes will fight getting stronger enemy. Protect your object in any price! Before you start: using the in-game shop will let you upgrade your sklls. Press F (interact key) and use (primary|secondary fire) to choose required option (check at top-right) then press Space (jump key) to buy. At the end press F (interact key) to close the shop. Good luck, hero!