Leading the bunch is the final game in the Mega Drive Sonic trilogy - Sonic the Hedgehog 3 (Or as it was known here in Europe, simply "Sonic 3"). The game has some very impressive graphics and music and is, of course, fun to play, so if you haven't played it yet and like Sonic, go for it!
The second game this week is the sequel to Capcom's Ghosts 'n Goblins (Which isn't on VC yet) - Ghouls 'n Ghosts. If you like a challenge, this is the game for you! It's got some really difficult parts and is great fun.
Third this week is Shining in the Darkness - This first-person dungeon crawler is nothing super-special, but if you're a fan of RPGs, it might be worth checking out, as it has some interesting ideas.
The fourth game this week is ESWAT: City Under Siege. This game is a semi-sequel to the arcade game ESWAT: Cyber Police. It seems largely forgotten nowadays, but is actually pretty fun to play and worth checking out.
Finally this week we have Crack Down. This port of the arcade game with the same name features you (And optionally, a buddy) placing bombs around buildings to blow them up. It's some good arcade fun, and can get quite tough in later levels, what with kamikaze enemies and flamethrower wielding soldiers.
So, wow, 5 new Mega Drive games on one day - Unfortunately, Landstalker is missing, and it's arguably the best game North America got recently. Still, don't be disappointed - These five games are all great too. Check out the reviews:
Sonic 3 - Mega Drive - 800 Wii Points