Sonic 1 Next Level updated sprites by LeroyUrocyon on DeviantArt

Colors Live - Generations of Sonic Sprites by SuperSonic Fan

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Sonic 1

The VG Resource - Doing Sonic 1-sized, Sonic 1-visual-styled

Sonic 1/CD Sprites (Expanded) by I-like-Sonic-91 on DeviantArt

The VG Resource - Doing Sonic 1-sized, Sonic 1-visual-styled sheets for other characters than Sonic

Sonic 1 sprite redraw by Bastian95 on Newgrounds

ArtStation - Sonic 1 Forever with Cartoony Sprites

Pixilart - sonic 1 ms sprites but i took them on as well by Tuxedoedabyss03

Sonic 1 Delta - SSRG Demo release

Sonic 1 TTS Prototype sprite recreation by Skele00 on Newgrounds