Sonic Underground

What is supposed to be a vacation for Sonic, Manic and Sonia turns into a battle to save Mobius when Robotnik attacks with his newest weapon - the Flying Fortress.

Sleet and Dingo escape the Flying Fortress with the Chaos Emerald.

The Hedgehogs begin to learn the important lessons of what it takes to be a freedom fighter.

Knuckles reluctantly makes a deal with Robotnik to turn over Sonic and his family in exchange for finding the Chaos Emerald that will save Mobius.

Manic, Sonic and Sonia must end their training early when Robotnik threatens the Oracle and takes a member of the resistance hostage.

The history of the Underground is told in detail, from the fall of Mobotropolis to the rise of Robotnik.

Argus, a captain of the Queen's guard, is captured by Sleet and Dingo before he can reach the secret rendezvous where he was to meet Queen Aleena.

Sonic, Sonia and Manic return to their birthplace, Mobodoon, a beautiful, festive town.

Sonia travels to east Mobius to visit her friend Mindy at the LaTour estate.

Sleet and Dingo plan to collect the taxes owed to Robotnik from the Duke of Velcronia but keep it for themselves.

The sinister Robotnik blackmails Cyrus, an old friend of Sonic's, by holding his father hostage.

On a trip to Port Mobius, Sonic, Manic and Sonia are told that ships are sinking due to the Mobian sea-beast.

Queen Aleena's royal journals are rumored to be buried under a palace in the city of Tashistan.

While lost in the wastelands of Mobius, Sonic, Manic and Sonia stumble upon an oasis called Lake Valley Resort.

Sonia is invited to a debutante ball, but before she can be officially announced to society, she and her brothers, Manic and Sonic have an important mission.

Robotnik organizes a track meet to lure Sonic into a trap.

The Hedgehogs receive a message they believe is from their cousin.

The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction.

A faction of the Freedom Fighters is wiped out by a swarm of metallic fly-bots.

A speed enhancing fluid deemed Sonic Tonic is created by Robotnik to make him as fast as Sonic so that he may finally catch him.

The Hedgehogs converge on the Floating Island, in their latest attempt to find their Mother.

As Sonic begins to chow chili dogs for a snack, he finds a message in the sack from his mother urging him to head to Speedster Island.

Sonic becomes frustrated that maybe all of their efforts of fighting for freedom seem futile.

Robotnik has his sights set upon Queen Aleena's crown jewel, which glows as it is moved closer her.

Sonic, Manic and Sonia find an abandoned baby in an alley and begin a search for the baby's parents.