Via IGN:
"The King of Fighters XI is fun, complex and has a ton of characters to try out, with only a handful of them requiring an unlock. At only about $20, it's hard not to recommend this to fighting game enthusiasts. While it doesn't bring anything new to the table, and its visuals fail to impress, the fast-paced tag-team battles and old-school challenge make this a title to look out for. Casual gamers beware: this is a game with an absurd amount of information to learn and master, so skip this one if you don't want to invest the time and sore thumbs."