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How to play
Underground Invasion is a fighting game. There are a group of monsters in the underground. They are invading people. Eliminate them before they get out of underground. Move the mouse to aim and click to shoot. Reload with R. Switch weapons with number keys 1 to 5. Buy some upgrades and new weapons in the shop. Visit www.flash-games.net to play this free game. Have fun and good luck!
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