Mission Street

Mission Street is the seventh stage in the Hero story in Sonic Adventure 2. It is a Tails level in which the two-tailed hero must slip through town and across a bridge that is under heavy construction, while being attacked by aerial missiles. The area is also prone to earthquakes, which causes some areas of the bridge to collapse.

Story Overview
After wittnessing Eggman'stest fire of the Eclipse Cannon, Sonic, Tails, and Amy realize that he's been collecting the chaos emeralds to fuel the cannon. Tails remembers that the chaos emeralds attract each other, and decides to use the emerald he received as a gift for saving Station Square in Sonic Adventureto find the others. The police find the trio at this point, and Sonic offers to keep them busy while Tails escapes to look for the other emeralds.

Trivia
The second mission in this stage challenges players to "Collect 100 rings!". However, there are only 99 rings in the stage, forcing the player to cross the whole stage and use the back ring to reset the rings locations to collect enough.