Worms 2: Armageddon is the sequel to Worms Armageddon, released 10 years ago for the Dreamcast, PC, PlayStation, and Nintendo 64. The gameplay is tried and true: use various weapons to take out the opposing teams' worm soldiers, taking into account trajectory, wind, and the sheer enjoyment of worm killing.
The King of Fighters '98 Ultimate Match takes The King of Fighters '98, adds a few more characters, and kicks the whole thing up a notch with Xbox Live support for a little 1-on-1 action. Sure, The King of Fighters XII comes out in a month, but this one has Mai in it.
Both games will be available early Wednesday morning for 800 Microsoft points apiece.