Tank Alien Assault is an online game at 43g.Com. You can play Tank Alien Assault in your browser for free.The alien invasion is largely already here on earth. The resistance forces have assembled the materials for a special match tank to take the aliens by surprise in their own base. As tank pilot it is your job to destroy the alien base with the enemies inside it. Be careful at the levels ahead of you are full of tricky traps that can.