Sonic Jr. (lost build of unreleased Sega Pico game; existence

New Game Releases 08/17/21 – 08/23/21 – The Avocado

Sonic Boom 2013 (lost livestream of Sonic the Hedgehog convention; 2013) - The Lost Media Wiki

Sonic at the Olympic Winter Games (found iOS game; 2010) - The Lost Media Wiki

Sonic Jr. (Unreleased Pico Game, 1994 Existence Unconfirmed

Sonic the Hedgehog (lost build of cancelled Amiga port of Sega Genesis platformer; 1992) - The Lost Media Wiki

Sonic Boom 2013 (lost livestream of Sonic the Hedgehog convention; 2013) - The Lost Media Wiki

Proto:Sonic the Hedgehog 3 - The Cutting Room Floor

Sonic the Hedgehog (serie) - Wikipedia, la enciclopedia libre

Sonic Runners (found endless runner mobile game; 2015) - The Lost Media Wiki