Help rust disappeared off steam account

So I have had rust for a while on my steam account and today I login and rust is no longer on there? Do I just grab the code and enter it again?

[sarcasm]u gut scammed
Garry has a secret plan to run off with all the money.[/sarcasm]

Contact steam support?

Try entering the code again.

Did you cheat at all? Not sure if VAC ban removes game or not.

Check your steam install folder?
Hours played?
etc…

there has to be some history in your steam account that you have played and installed it.