CORE - the Creative Options Roleplaying Engine
CORE is a hybrid RPG, blending traditional concepts with narrativist techniques for character-driven emergent story. It's also the basis of our best-selling game DayTrippers and other games by various developers. CORE's design focus is on simplicity, speed, and improvisation. Everything is on the same scale. All actions use a single Yes/No/And/But mechanic. Results are narratively interpreted. And it's built to be hacked.
Now available: the CORE Micro SRD
Itch (PDF)
https://as-if.itch.io/core-micro
Drivethru (PDF or Print):
https://www.drivethrurpg.com/product/323467/CORE-Micro
Amazon (Kindle or Print):
https://www.amazon.com/dp/B09MCJY5JT