Alien Syndrome is a cooperative top-down shooter with aliens developed by SEGA as an Arcade game in 1987.
Two players control two soldiers, named Ricky and Mary, who fight their way through large eight-way scrolling levels while rescuing their comrades who are being held by aliens.
After they have rescued a certain number of hostages, the exit opens and they can pass through it in order to fight the end-of-level guardian. If this monstrosity is defeated, they are then able to move on to the next stage. Alien Syndrome features two-player simultaneous gameplay and pickups which assist the player, including better weapons and maps of the current level.
Use arrow key and try some key ( Shift, Enter, Z, X, A, S , Q, E, R, T, G, F, H ) to controls the game.