Boss is one of the Sub Games from Sonic Adventure and Sonic Adventure DX: Director's Cut. This Sub Game is accessible to all characters except for Super Sonic, and can be found after the player completes their respective character's Adventure Mode.
In Boss, the character fights all the bosses in the order that was played on Adventure Mode. When all the bosses have been defeated, the times for each boss are displayed on the screen, with the Total time result accumulating all the individual boss times together. If quick enough, the Total time will be posted onto the leaderboard. There are no Emblems to be awarded here.