Hold CIRCLE as the game is starting before the Sega logo appears to hear the old school SEGA voice.

Defeat all opponents in Arcade mode (including Dural) without using a continue to hear a different song during the credits.

To get a Taka-Arashi gamerpic, complete all 50 of the License Challenges in Single Player mode.

To unlock the bonus boss Dural for play, fight her in Arcade Mode. Whether you defeat her or not, you unlock her. Note that you won't be able to use Dural online except in Room Matches.

ACHIEVEMENT - HOW TO UNLOCK
Student (60 points) - Play any training session in Tutorial Mode.
Challenger (20 points) - Play ten ranked matches.
Up and Coming (20 points) - Play one ranked match.
Ten Tests Complete (20 points) - Complete ten tests in License Challenge Mode.
Five Tests Complete (20 points) - Complete five tests in License Challenge Mode.
Test Complete (20 points) - Complete a test in License Challenge Mode.
5 Hit Combo (20 points) - Perform a five-hit combo in Score Attack Mode.
Score Attacker (40 points) - Play Score Attack Mode.
VS Dural (60 points) - Face off against Dural in Arcade Mode (any difficulty level).
Excellent (40 points) - Win a round without taking any damage in Arcade Mode (any difficulty level).
Ring Out (40 points) - Win a round by knocking your opponent out of the ring in Arcade Mode (any difficulty level).
You Win (40 points) - Win a match in Arcade Mode without losing a round (any difficulty level).