The 1999 edition of Space Invaders rebuilt the game from the ground up. It was fully coloured and modelled in 3D with a new feature involving special attacks, based on a variety of aliens with different abilities. Hitting four of the same type of alien would grant one special missile to the player, fired with an alternative fire key. Players can save their progress at any point. The pilot wastes no time opening fire on the aliens. He destroys them all by striking one and causing a chain reaction explosion, at which point the cinematic ends. Stage 1 - Pluto Boss - 'Squashie' Stage 2 - Neptune Boss -