Bonus Bosses in Arcade mode...
	Fight character's second rival...
	Various Achievements...

Face the corresponding Boss after defeating Seth, by completing the indicated task.

Boss	Task
Akuma	Do not lose any rounds and get a Perfect Victory.
Evil Ryu	Do not lose any rounds and get a Perfect Victory, then defeat Seth with a Super or Ultra combo.
Gouken	Do not lose any rounds, get a Perfect Victory, get ten First Attacks, and have five Super or Ultra combo finishes.
Oni	Do not lose any rounds, get a Perfect Victory, get ten First Attacks, have five Super or Ultra combo finishes, then defeat Seth with a Super or Ultra combo.

Note: Use the normal three round setting!

When playing as Ryu, Cammy, Chun-li, Seth, C.Viper, or Guile immediately hold all the kick buttons when the "Now! Fight your Rival!" message appears.

Unlock Xbox Live Gamerscore points, by completing the following Achievements.

Achievement	How to unlock
Birth of the Oni ( 50 points )	To surpass the power of Oni, you must defeat him in Arcade Mode on the hardest setting.
Just Enough! ( 10 points )	Dude, just clear Arcade Mode on Medium or higher without using a continue with Yun! Piece of cake!
New Threads ( 10 points )	Use a new Title and Icon, and fight in one Xbox LIVE match. Right on!
Overwhelming Power ( 10 points )	If you seek power, clear Arcade Mode on Medium or higher without using a continue with Evil Ryu.
Prep Time ( 10 points )	You need study materials to make your battle plan. Follow one player in the Leaderboards.
The Awakening ( 50 points )	As if you could ever defeat Evil Ryu in Arcade Mode on the hardest difficulty. See for yourself!
Transcendent ( 10 points )	Ascend beyond oneself by clearing Arcade Mode on Medium or higher without using a continue with Oni.
Up to Snuff ( 10 points )	Clear Arcade Mode on Medium or higher without using a continue with Yang. It's simple!