I recently release a developer kit that is essentially a pack of tutorials and guides for creating pixel art sprites that are standardized in scale, style and workflow, meant to create a consistent complete solution for representing any object or character in a physic ragdoll 2D platformer perspective game.

It features a customizable human character that tries to mimic the 3D game equivalent of customizable characters like the ones by Bethesda (Skyrim, Fallout, Starfield) or Bioware (Mass Effect, Dragon Age), featuring component-based human bodies and modular faces for endless combinations. *clothes not included though, I've provided guides and templates that should make it easy to draw them yourself though, with some practice.

Get it here on OGA:

https://opengameart.org/content/psrc-human-mk2-and-ultimate-devkit

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Theres more info here:

https://reactorcore.itch.io/psrc-human-mk2-and-ultimate-devkit

...along with another Pixel-art Beginner to Pro guided curriculum tutorial pack I've compiled here:

https://reactorcore.itch.io/deep-pixel-art-skill-tutorial-pack