Missions range from offence to defence missions- upon which you can build a base to stop the alien horde. There is also a survival mode with 6 maps, where you destroy wave after wave of incoming aliens. Compete with local and global (gamecenter) high scores. Earn in-game money with every battle you fight, or even achievement you earn. You can spend on upgrading your weapons by buying different components. There are 7 different upgradable parts, this means you can completely customise your gun and armour to suit your style of play. There are over 70 different items and components in the game with which to do this; including 17 core weapons which range from standard rifles to flame-throwers and rocket launchers: Make a fast firing sniper rifle with exploding rounds or a deadly powerful shotgun with a bayonet for close encounters! Features: -Main 10 mission story-driven campaign, narrated by graphic novel style illustrations. -Over 70 items/components with which to customise your armoury. -6 Different survival maps with GameCenter high scores. -27 GameCenter achievements which earn you in-game money. -A mixture of action and tower defence style gameplay.
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