Sega Superstars Tennis - Platform: Xbox 360

Achievements:
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Complete the following achievements to unlock Xbox Live Gamerscore points.

Play Ball (10 points): Win your first match. 
Starting Grid (10 points): Win with all 8 starting characters. 
Beat them All (30 points): Beat all characters in Singles matches. 
Original Teams (30 points): Beat all the classic Doubles pairs. 
Cameo Appearance (20 points): Hit a Sega court cameo. 
To The Max (20 points): Hit 3 Max serves in a row. 
Seeing Stars (20 points): Enter Superstar mode 10 times in a match. 
Sega Rally (20 points): Hit a 40 shot rally. 
Top Gun (20 points): Hit 100 aces. 
After Burner (20 points): Hit a serve over 100mph / 160kph. 
OutRun (20 points): Run a total of 10 kilometers / 6 miles. 
Step into Sega World (10 points): Complete your first Challenge (Rank A). 
Classic Complete (20 points): Complete all Challenges in one Sega game (Rank A). 
Challenges 101 (30 points): Complete all Challenges in all Sega games (Rank A). 
To be this good takes AGES (60 points): Complete all Challenges in all Sega games (Rank AAA). 
Full Roster (30 points): Unlock all Secret Characters. 
Play the Field (30 points): Unlock all Secret Courts. 
Score Attacker (30 points): Unlock all Ball Games. 
Magical Sound Shower (30 points): Unlock all Secret Music Tracks. 
Climb the Ladder (20 points): Win the final stage in Tournament mode. 
Secret Stage (30 points): Beat the hidden stage in Tournament mode. 
Mouse Mania! (20 points): Rescue 500 ChuChus over time!. 
Zombie Hunter! (20 points): Hit an 8 zombie combo!. 
Master Tagger! (20 points): Clear a Tag without missing a shot!. 
Puyo Puyo! (20 points): Clear a 20 Puyo combo!. 
Super Sonic (20 points): Collect 7 Chaos Emeralds in one game!. 
Dragon Slayer! (20 points): Destroy the Final Squilla in under 20 seconds!. 
Pot Black! (20 points): Clear 4 Trick Shots in one game!. 
Supercop! (20 points): Destroy Kong without being hit!. 
Party Time (30 points): Play each type of Ball Game Multiplayer. 
Surf the Net (10 points): Win a Match on Xbox Live. 
Top of the Tree (20 points): Win a Tournament on Xbox Live. 
Ball Buddies (30 points): Win 5 Xbox Live Doubles matches. 
Top Ranker (20 points): Win 10 Xbox Live Ranked matches. 
Let's Get Friendly (20 points): Win 10 Xbox Live Player matches. 
Space Channel 5 (10 points): Watch a match on TV. 
Swinging Report Show (30 points): Become a TV Superstar. 

Additionally there are eight secret achievements, all of which are currently unknown.

Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 
Secret achievement (20 points): Unknown. 


Unlockables:
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Bonus characters
Complete the indicated task in Superstars mode to unlock the character.

Alex Kidd: Complete Tournament Singles in the "Alex Kidd" stage. 
Amy Rose: Complete Tournament Singles in the "Sonic The Hedgehog" stage. 
Gilius Thunderhead: Complete Tournament Singles in the "Golden Axe" stage. 
Gum: Complete Tournament Doubles in the "Jet Set Radio" stage. 
MeeMee: Complete Tournament Singles in the "Super Monkey Ball" stage. 
Pudding: Complete Tournament Singles in the "Space Channel 5" stage. 
Reala: Complete Tournament Singles in the "NiGHTS" stage. 
Shadow the Hedgehog: Complete "Tournament Doubles" in the "Sonic The Hedgehog" stage. 

Bonus stages:
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Complete the indicated task in Superstars mode to unlock the  stage.

Alex Kidd: Complete "Get A High Score!" in the "Space Harrier" stage. 
Outrun: Complete "Hit Justice Shots" in the "Virtua Squad" stage. 
Space Harrier: Complete Tournament Singles in the "Space Channel 5" stage. 
Virtua Squad: Complete "Hit The Big Zombies!" in the "Curien Mansion" stage.