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.

An early internet user disagreed with Sonic 2 being a CD-ROM game, believing CD-ROMs were novelty items that the general public lacked money or interest for, and that Sega would alienate customers by releasing it on that format.

An early internet user was confused about the number of Chaos Emeralds, believing there were only six instead of seven.

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.