what are the controls for sandbox mode, and how do i unlock everthing? If you click ` or fn + esc (for a 60% keyboard) you are able to bring up a command system to allow you to almost do anything. To get every cosmetic, you need to download a mod that gives you level 150. I will not be helping people with mods as I simply don't know how to. Some of them may not even be safe.
also can mods be installed on this game? Yes you can but there are little to no mods. Applying mods should not be complicated but I do not know how to.
NOTE: THE REAL FRIDAY THE 13TH GAME HAS NOTHING TO DO WITH THE SERVERS OF THIS GAME. THIS GAME JUST SIMPLY HAS NO SERVERS ONLINE AND THERE NEVER WILL BE ANY SERVERS ONLINE.