Sonic 1 Next Level updated sprites by LeroyUrocyon on DeviantArt

Sonic 1 sprite HD : r/SonicTheHedgehog

Sonic Sprites by SpongeDrew - Pixilart

Pixilart - Sonic 1 sprites pt1 by Bubb13

Alternate Extra Mode Sprites [Sonic the Hedgehog Forever] [Mods]

Sonic The Hedgehog (1991) - Sonic's Sprites by AsuharaMoon on DeviantArt

Sonic Origins: Sonic 1 Sprites for all Games

Mastered Realm on X: Did you guys know Sonic CD had a unique art style for sprites on some areas? Sonic Mania style is closer to that one than Sonic 1 itself! #

Sonic 1 SMS vs Sonic Edusoft

Spelunky FYI: Modding > Spelunky 2 > Mod > Sonic the Hedgehog

User blog:Moon the Hedgehog/Sonic the Hedgehog Sprites, Sonic Wiki Zone