Bevy Engine
bevyengine.org
Bevy is a refreshingly simple data-driven game engine built in Rust. It is free and open-source forever!

For me, it’s just ECS nature and Schedule that optimizes everything for you.

It’s near native C / Assembly with safe garbage collection, so everything complex like some simulations should be more doable. I play Tunnet with no stuttering on my Linux machine in 4K and 144Hz!