7 - SNES - Super Metroid (+)
6 - GC - Metroid Prime
5 - GBA - Metroid Fusion
4 - Wii - Metroid Prime 3: Corruption (-)
3 - NES - Metroid
0 - GC - Metroid Prime 2: Echoes (-)
But I have to say this system is ridiculous. People seem to be voting down the high ones because they're scored higher than their favourite. I doubt that many people actually believe Super Metroid is the worst.
"Now, a fun game should always be easy to understand - you should be able to take one look at it and know what you have to do straight away. It should be so well constructed that you can tell at a glance what your goal is and, even if you don’t succeed, you’ll blame yourself rather than the game. Moreover, the people standing around watching the game have also got to be able to enjoy it." - Shiggy