I have a Steam account but the "Sign in with Steam ID" button is not there.

The "Sign in with Steam ID" button only appears when Robocraft is launched from the Steam library directly, make sure you are not using a desktop icon or launching from the task bar.

You can not use our Launcher if you have signed up with Steam.

 If you are already using Steam please restart it as sometime Steam can lose connection to Robocraft.