Several mandatory updates have graced the Xbox 360 over the last few days. You'll be forced to apply the patches if ya wanna play the games on Live. Here are the games that require the update:

Dead or Alive 4
King Kong
Xbox 360 Arcade: Smash TV
Toryumon
Xbox 360 Arcade: Hardwood Hearts
Madden NFL 06
And the Xbox360 Dashboard

No one seems too sure on what these patches do. No word from Microsoft or the game publishers. All we know is that'll you're gonna hafta patch 'em whether ya like it or not.

Yup.

Source: Major Nelson