Speaking of "Space Invaders", I recently acquired the Saturn import two pack with SI and Puzzle Bobble 2X. And let me tell you right now:The Saturn SI game, is the biggest "WTF??!!" game collection disc I own. It's absolutely pathetic. All it is is just 4 different versions of the original Space Invaders game. One is the original black and white version, one is the version with the 4 color bar overlay, one is the one with the moon backdrop from the arcade cabinet, and one has the sprites in color instead of black and white. There's also a VS. mode which to my knowledge I believe has all the graphics and sound re-arranged, BUT YOU CAN'T PLAY THAT MODE UNLESS YOU HAVE TWO PLAYERS! I hope this disc alone didn't cost too much back when it was released in 1996, because who would want to pay 40-50 bucks on a Saturn disc that has 4 different versions of the same exact game? Why couldn't they just include ALL the different Space Invaders games from over the years like "Return of the Invaders" or "Space Invaders '91" or "Space Invaders DX"? Instead you just get 4 variations of the original arcade game and a VS mode you can't even play without two players, and that's it. What a joke. If you really wanna play this version of the game though, don't get the disc by itself, get it in the two pack with Puzzle Bobble 2X, because it's not worth paying $20-30 for a single disc that just has 4 variations of the same game and a new mode that you can't play without two people.