Metal Slug XX, due out for Japanese PSPs this month, joins three other SNK arcade titles on Xbox Live Arcade in early spring, Siliconera reports. In the past SNK has released its Japanese, North American and European XBLA titles simultaneously.
The three other titles going to XBLA are NeoGeo Battle Coliseum, The King of Fighters 2002: Ultimate Match, and KOF Sky Stage. Then SNK will finish The King of Fighters 2002: Unlimited Match for summer 2010.
Siliconera says that, while the release windows have only been announced for Japan, in the past SNK's Xbox Live Arcade games have arrived in North America and Europe the same time they release in Japan, whether or not they're fully translated. More Metal Slug And King of Fighters For Xbox Live Arcade [Siliconera]