Rust opens then closes instantly

Title says it all, I tried uninstalling, reinstalling, restarting steam, and even reinstalling steam altogether. Worked perfectly fine last night, now it opens and the steam library says running for a few seconds, no window opens. The running sign next to rust vanish and the game closes. I need a fix.

Verify your game cache and/or reinstall eac.

sometimes a clean reboot is useful, but short of that try restarting steam. what are your specs? (cpu, ram, gpu, os).