Sonic Adventure Secrets (Dreamcast)

Unlock E-102 Gamma: Complete Sonic's story or Tails' story.

Unlock Big the Cat: Complete Sonic's story or Tails' story.

Unlock Super Sonic: Complete all six character stories.

Unlock Metal Sonic in Trial Mode: Get all 130 Emblems.

Gold Chao Egg: Take an adult Chao with a Sonic character. Repeat the Chao Race Circuit a few times with a Gold Egg.

Silver Chao Egg: Take an adult Chao with a Sonic character. Complete Chao Race and find it in the Station Square Chao Garden.

Black Chao Egg: Find in the Egg Carrier Chao Garden.

Game Gear Games: Complete various missions to unlock classic Game Gear Sonic games.

Crazy Taxi Secrets (Dreamcast)

Another Day Mode: At the character select screen, hold R and press Start.

Expert Mode (No Arrows): Hold R+Start at the character select screen.

No Destination Markers: Hold L+Start at the character select screen.

No Traffic: At the character select screen, hold both triggers and press Start.

Taxi Bike: Hold L+R at the character select and press Start for a bicycle instead of a taxi.

Crazy Box Tips:
- Crazy Jump: Use the Crazy Dash to get height.
- Crazy Drift: Use the Limit Cut technique for tight turns.
- Crazy Bowling: Line up straight and use full speed.

Soul Calibur Unlockables (Dreamcast)

Unlock Cervantes: Complete Arcade Mode with Sophitia.

Unlock Hwang: Complete Arcade Mode with any Korean character.

Unlock Seung Mina: Complete Arcade Mode with Hwang.

Unlock Yoshimitsu: Complete Arcade Mode with any character.

Unlock Lizardman: Complete Arcade Mode with Sophitia and Astaroth.

Unlock Rock: Complete Arcade Mode with Astaroth.

Unlock Inferno: Unlock all other characters and beat Arcade Mode.

Unlock Edge Master: Complete Arcade Mode with all regular characters.

Art Gallery: Earn points in Mission Mode to unlock artwork.