A spacecraft known as the Vic Viper must defend itself from the various alien enemies, in this horizontally scrolling shoot 'em up arcade game.A spacecraft known as the Vic Viper must defend itself from the various alien enemies, in this horizontally scrolling shoot 'em up arcade game.A spacecraft known as the Vic Viper must defend itself from the various alien enemies, in this horizontally scrolling shoot 'em up arcade game.