This is an Apparatus ECS demo featuring fluid-like physics simulation of 700+ spherical boids. Everything is implemented in Blueprints, from scratch, including collision detection, decoupling/response, spatial partitioning, physics and logic. No Actors/Objects used, the whole logic is made through Apparatus low-level entities - Subjects. This is a good stress of what you can achieve both in Apparatus and Blueprints.
The 70% SALE ends tomorrow so gotta hurry up!