Full info here:

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

TL;DR For Busy People

Advanced 2D character system with ultra-customizable Human & Skeleton Mk2 sprites in 17+ color variants. Includes modular body parts (torso, limbs, heads, hands, feet), facial features, clothing templates, and anatomical options for maximum flexibility. Paper-doll design works with physics engines and skeletal animation.

Core for the PSRC standardized sprite system - a comprehensive visual library supporting everything from small objects to entire universes. Features greyscale base sprites with color overlays, neutral shading for any lighting system, scales 25%-600% while staying crisp, and combines with 3M System for large-scale objects. Perfect for open world simulation games with maximum mod/collaboration support.

Opportunity To Earn Money as an Artist - use the included devkit guides to create and sell your own PSRC-compatible sprite packs while keeping 100% revenue. Easy to learn system designed for beginners and pros alike.

Learn pixel art from scratch - comprehensive tutorial curriculum with ~300 files from master artists (Cyangmou, Saint11, Slynyrd, etc.) organized into focused lessons from basics to advanced techniques. No more scattered, aimless tutorials - follow a clear path to master gamedev pixel art and the PSRC style specifically:
https://reactorcore.itch.io/deep-pixel-art-skill-tutorial-pack
(Use in conjuction with this devkit’s materials)