All of the I've played

A blue hedgehog with supersonic speed must rescue animals from being turned into robots by a mad scientist.

Sega Genesis version of Sonic the Hedgehog 2. Sonic teams up with Miles "Tails" Prower to stop Dr. Robotnik from taking over the world with his new space fortress, the Death Egg.

Sonic and Tails attempt to retrieve the Chaos Emeralds from Knuckles the Echidna, who is working with Doctor Robotnik after Robotnik's space station, the Death Egg, crash-lands on a mysterious floating island.

Sonic the Hedgehog and Knuckles the Echidna, once enemies, now allies. Teamed together to stop that evil scientist, Dr. Ivo Robotnik, from taking control of the world with his crazed hover crafts and mad robots.

Sonic and Tails attempt to retrieve the Chaos Emeralds to stop the evil Doctor Robotnik from relaunching his space station, the Death Egg, after it crash-lands on Angel Island, while Knuckles scuffles with Robotnik's minion, EggRobo.

Sonic and Tails must collect the Chaos Emeralds before Eggman can use them to power an angry water creature known as Chaos. Meanwhile Knuckles attempts to repair the shattered Master Emerald and Amy must evade capture from an Eggman robot.

A remake of 'Sonic Adventure' for the Nintendo Gamecube.

Sonic is arrested after being falsely accused of crimes committed by another hedgehog named Shadow. Meanwhile, Eggman threatens to destroy the world in 24 hours with a planet destroying weapon if the world doesn't surrender to his rule.

A remake of 'Sonic Adventure 2' for the Nintendo Gamecube.

A party game for the Dreamcast. Characters advance around a board game while playing mini-games in between turns, like Nintendo's Mario Party.

When Dr. Eggman shatters the planet into 7 pieces, releasing a powerful creature that was sealed in the planet, Sonic must search the planet for 7 temples to use the Chaos Emeralds power to repair the world and destroy the creature that has been released, all while dealing with a werewolf curse.

An unknown enemy causes the appearance of multiple "time holes", forcing Sonic and his friends back in time. As a result, Sonic must band together with his past self to defeat this enemy and fix the timestream.

The third game in the Sonic Advance series.

Sonic the Hedgehog's first ever adventure on a Nintendo console.

The sequel to the popular Gameboy Advance game "Sonic Advance" has Sonic and friends fighting Dr. Robotnik, a new character named "Cream" has been added.

Four separate teams set off on an adventure with different goals but the same target; Dr. Eggman. Along the way, they slowly begin to realize that things aren't exactly what they seem.

A racing game featuring characters from the Sonic games.

Choose from a roster of characters from the Sonic the Hedgehog series and fight in a tournament to earn Chaos Emeralds to power a spaceship and stop Doctor Robotnik and Metal Sonic from building a fortress in space.

Sonic must save the past, present, and future of Little Planet, as well as rescue Amy Rose from his evil double, Metal Sonic.

A collection of seven classic Sonic games, plus bonus artwork and videos.

A collection of three classic Sonic games, including Sonic CD.

Race as characters from Sonic and Sega games in a variety of fun tracks, with several weapons, unlockable items, and challenges to enjoy.

When 99% of the world has been taken over - and an alternate version of Sonic has been summoned by Dr. Eggman, Sonic and friends create a resistance to fight back his evil forces.

After Doctor Eggman's attempts to control an ancient technology goes wrong, Sonic sets out to rescue his friends and learn the true nature of the technology.

Knuckles and the Chaotix must prevent Doctor Robotnik and Metal Sonic from obtaining six magic rings and conquering a mysterious island.