I've been playing rust for a while now and the game is honestly so fun however I feel like unity isn't very suited for Rust. Since Facepunch are developing their own game engine (based on Source 2) I feel like its only right to port Rust to s&box. Not only so they dont have to spoonfeed Unity bags of money everytime someone buys Rust but your also using a more advanced-ish game engine using Source 2 rendering.
I think this would also be good because its Facepunch proving to the community that s&box can handle amazing games like Rust.
