Space Invaders for the Atari 2600 wasn't an exact port of the arcade game, as some of the basic gameplay mechanics had slight changes, plus the cart had 112 game variations.
Space Invaders Deluxe is a hack of the game, which, as the title suggests, was made out to be more like the arcade sequel (also known as Space Invaders Part II), with the "S. O. S.!" intermission between waves and all.
The game has two secret bonuses included.
What to doEdit
Shoot a second from the bottom invader last for a 500 point bonus, and the closest invader last for a 1000 point bonus.