Invaders is a free classic space shooter: pilot your ship along the bottom of the screen and blast descending waves of aliens before they land. On desktop, move with the left and right arrow keys or A and D, and fire with the spacebar. On mobile, use the on-screen left/right and fire buttons, or drag across the playfield to move and tap to shoot. Aliens march sideways as a formation and drop a row each time they hit an edge — the fewer that remain, the faster they move.

Hide behind the destructible bunkers when bombs rain down, and watch for the bonus UFO that occasionally streaks across the top. Clear a wave and a tougher one arrives. You start with three lives; lose them all or let aliens reach the ground and the game ends. Your best score is saved in the browser — come back anytime and beat it in this free online alien invader game.