Earned the Bronze "Loot Courtesan" medal.
Completed one match in all six Versus multiplayer modes.
Become friends with Amy.
Become friends with Knuckles.
Continue playing to unlock this secret achievement.
Meet DJ Ricks in the Radio Station.
Escape from 20 monsters.
Complete the "Stolen Goods" side quest.
Escape from Devil's Pit.
Kill or incapacitate 10 Screamers.
Ride the Sky Tram to Devil's Pit.
Survive the Diner Otherworld.
Become friends with Tails.
Perform all of Sonic's moves in Act 2.
Get Rank S in three Acts.
Defeat 100 enemies.
Get Rank S in an Act.
Race through the first stage.
Completed 5 Arcade Campaign chapters in co-op.
Your respect for the dead earned you access to Griffin's special weapons stash.
Reached level 25.
Completed the first 12 waves of Beast.
Recovered 20 of 42 Collectibles.
Perform 30 Hyper Combo Finishes. (Arcade/Xbox LIVE only)
Earn 30,000 Player Points (PP).
Decide who is the true master of the fist in a Xbox LIVE match.
Make a match on Xbox LIVE between a national hero and a killing machine a reality.
Land a Team Aerial Counter in a match. (Arcade/Xbox LIVE only)
Heal with 101 Green Herbs (lifetime)
Obtain the boot-up key in Scenario Campaign Mode.
Defeat 1000 enemies in Scenario Campaign Mode.
Recover your memory in Scenario Campaign Mode.
Clear the Arcade Battle in Offline Mode.
Win a match without calling your partners or switching out. (Arcade/Xbox LIVE only)
Participate in any mode on Xbox LIVE.
Surpass the rank of Amateur.
Use X-Factor in a match. (Arcade/Xbox LIVE only)
Win a match without blocking. (Arcade/Xbox LIVE only)