It's a quiet week on Nintendo platforms (except, of course, for last Sunday's New Super Mario Bros. 2 launch), with just one new game per platform.
Wii Virtual Console fans can rescue hostages and blow up everything that isn't a hostage in Metal Slug X; 3DS owners get to see through the track in VectorRacing; and DSiWare has a sort of submarine exploration game called Abyss.
Metal Slug X(Neo Geo, 1-2 players, 900 Wii Points): An updated, remixed game based on Metal Slug 2.
VectorRacing(Arc System Works, 1 player, $6.99): A racing game with vector-style graphics, featuring twelve different tracks.
Abyss(EnjoyUp Games, 1 player, $1.99/200 DSi Points): Pilot a biomechanical robot through dark undersea mazes to find energy.