Where is S&Box

so i think garry and his team is still working on it , there'll be more info in the future but i'm pretty sure it will get out in late of 2018 or in 2019 (maybe there'll be an alpha or beta before that)
Check garry's twitter or facepunch forum for futher information
cool link : https://sandbox.facepunch.com/
https://twitter.com/garrynewman
https://sandbox.facepunch.com/f/gd20
those link are all related to the game
edit : Rust has still wip so yeah this is why you'll need to wait for seeing s&box