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Operation:Onslaught

Description :
An intense overhead shooter featuring a robust 13-mission campaign, 4 unique minigames, and 9 solid weapons. Fight over 30 animated monsters, and take on 5 crazy bosses while competing over 6 leaderboards. Upgrade your weapons, buy ammo, armor and forcefields to survive and open more than 25 unlockables including 10 "hacks" to modify the game.

Instructions :   
Work your way through the campaign to unlock new levels and minigames.