Sonic Underground

Robotnik announces that he will marry Queen Aleena in a plot to become the king of Mobius

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

Sonic and his siblings travel to the outskirts of Mobius to recruit a tribe of nomads for the Resistance

Sonic, Manic and Sonia invade Robotnik's lair to retrieve the Hedgehog crest

The Hedgehogs latest quest to find their mother takes them to the prison tower where they encounter a masked stranger who insists he is family

The Oracle advises the Hedgehogs to undertake a mission which could reveal answers about their future

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