Alien Worms Invasion is a game of futuristic exploration and tower defense. In the game, you can explore unknown areas and build bases and units to defense the attack of the worms which would be killed in the end. At the same time, you can produce various kinds of soldiers by rescuing the tripped people in the wild or building the armies in order to protect the base and even to attack the worms' nests. The longer time you play the game for, the stronger the enemies will be in the game. Whether you can finish the tasks in the game depends on how to balance the power between the defense and the attack.