An early internet user named Doug stated that Sonic the Hedgehog moves differently from other run and jump games, possessing a grace and speed that no other game had achieved at the time.

The commonly cited June 23, 1991, release date for Sonic the Hedgehog, introduced in Sonic Jam, is inaccurate because multiple early internet forums discussed the game before that date.

An early internet user struggled to get past the first boss in Sonic the Hedgehog.

Early internet users speculated about a hypothetical Sonic the Hedgehog sequel, with some predicting features like multiple paths and a two-player mode.

An early internet user named Thompson described Marble Zone in Sonic the Hedgehog as tricky, requiring skill, precision, and brains, unlike previous zones where running at top speed was effective.