Story of Thor is pretty good. What you ought to do though, before downloading any of these on the Wii, is try them out via an emulator on your computer. This way, even though we may talk very highly of certain titles, you'll be able to see what you'd actually like and what's worth the money(btw, how much is 800 Nintendo points?).
This is what I would recommend:
Altered Beast
http://www.whipassgaming.com/genesisreview...teredbeast.htmlBio-Hazard Battle
Slick side scrolling shooter
Columns
It NEVER gets old...ever.
Comix Zone
http://www.whipassgaming.com/genesisreview...one_choose.htmlGain Ground
Addictively fun
Golden Axe
A classic, and a mandatory purchase imo.
Gunstar Hereos
Not ever playing the GBA version, I don't know if they are very much alike, so you not liking one will also not like the other....but this really is good stuff. Try it via emulation and see what you think. Speaking of, I need to try out GBA GH via emulation...
Kid Chameleon
This is pretty good, and hopefully they allow for saved states on the Wii rom of this(it's over 100 levels long). You use these helmets to transform into other things to get through levels.
Ristar
Not quite Sonic, not quite Dynamite Headdy, but somewhere in the middle. Good, original stuff.
Sonic the Hedgehog
Of course.
Streets of Rage/Streets of Rage 2
Two of the best beat'em ups on the system.
Sword of Vermillion
An RPG/Action hybrid. Really amazing music by Yuzo.
ToeJam and Earl
The original, and still one of the best games on the Genesis. Part 2 is good as well, but it's much, MUCH different.
Vectorman
One of my all time favorite sidescrolling action games. Amazing special effects.
Bel