Metal Swarm is an amazing fun retro game similar of Sky Fox and some other old titles. In short the plot is something like – the Earth is under attack from swarm of deadly metal aliens and you must defeat them. Use your twin blaster spaceship or something like this to destroy the swarm and its Queen and then save the Earth. The baddies drop some bonuses so collect them for points and better weapons.
Use the arrow keys to move left and right and space to shoot.