And another: Shadow Gangs Zero (not sure if it's different from the Shadow Gangs II already in the list?)
https://twitter.com/ShadowGangs/status/1777403233717129598
Oh yeah, they are different.
Shadow Gangs II is a sequel of Shadow Gangs I for SEGA Dreamcast, Neo Geo, and PC.
Shadow Gangs Zero was originally started as a demake / 16-bit version of Shadow Gangs I but then grown into a more ambitious project featuring altered level layouts, more animation frames, redone soundtracks, and additional stages so now it's becoming both demake version and prequel of Shadow Gangs I.
Added to the list, thanks Billybob.