Bonjour ,
Sonic Adventure :
Amy Rose (10) Become friends with Amy.
Big the Cat (10) Become friends with Big.
Chao's Best Friend (20) Get all Emblems of the Chao Race.
E-102 Become friends with E-102.
Knuckles the Echidna (10) Become friends with Knuckles.
Miles Become friends with Tails.
Sonic the Hedgehog (10) Clear the Sonic story.
Sub Game Master (20) Get all Emblems of the Sub Games.
Super Sonic (20) Clear all characters stories.
The Adventurer (20) Get all Emblems in the Adventure Field.
The Fastest & Strongest (20) Get Level A on all the Action Stages.
The Perfect Adventurer (40) Get all 130 Emblems.
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Crazy Taxi :
Amazing Driver (30) You have cleared 3-1 through 3-S of Crazy Box.
Arcade A-license (15) You have got A class license in Arcade mode.
Arcade B-license (10) You have got B class license in Arcade mode.
Arcade C-license (5) You have got C class license in Arcade mode.
Arcade S-license (20) You have got S class license in Arcade mode.
Crazy Driver (40) You have cleared Special 1 through Special Stage of Crazy Box.
Original A-license (15) You have got A class license in Original mode.
Original B-license (10) You have got B class license in Original mode.
Original C-license (5) You have got C class license in Original mode.
Original S-license (20) You have got S class license in Original mode.
Skilful driver (10) You have cleared 1-1 through 1-S of Crazy Box.
Superb Driver (20) You have cleared 2-1 through 2-S of Crazy Box.
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Space Channel 5: Part 2
Apprentice Dancer (5) Achieve 25% in Single Player Ulala's Dance Mode.
Awesome Dancer (10) Achieve 50% in Single Player Ulala's Dance Mode.
Competent Reporter (25) Clear Reports 1-6 in Single Player Story Mode.
Excellent Reporter (25) Clear Reports 1-6 in Single Player Story Mode for the 2nd World (Extra Mode).
Fever Dancer (25) Clear the Single Player Ulala's Dance Mode.
Hello World (5) Clear Report 1 in Single Player Story Mode.
HOOOOO!!!! (10) Rescue Space Michael.
Passionate Reporter (10) Rescue Jaguar.
Perfect Reporter (30) Earn perfect ratings for all the Reports in Single Player Story Mode.
Secret Explorer (25) Clear all the hidden commands.
Skilled Dancer (15) Achieve 100% in Single Player Ulala's Dance Mode.
Skilled Reporter (15) Earn a perfect rating in any one Report in Single Player Story Mode.
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Sega Bass Fishing
A Gift Lure (10) You got a new lure in ARCADE MODE.
Amateur Winner (10) You won the Amateur Tournament.
Arcade Winner (10) You cleared ARCADE MODE.
Challenge Winner (15) You won the Challenge Tournament.
I Love Fishing (20) You caught a total of 500 basses.
Lure Collector (20) You got the 14th and final Lure by placing 1st in all 5 Stages of the Professional Tournament.
Masters Classic Winner (20) You won the Masters Classic Tournament.
Perfect Angler (30) You won all the stages in the Professional Tournament.
Professional Winner (15) You won the Professional Tournament.
Ranker Killer (15) You caught over 30 Huge basses in ORIGINAL MODE.
Top Water King (15) You caught over 50 basses in ORIGINAL MODE by using Top Water lures.
Unbelievable Size (20) You caught a bass that weighs more than 20 lbs.
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Source : http://www.cheatsguru.com/xbox360/dreamcast_collection/cheats/
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http://www.youtube.com/user/kidpaddle59
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