This project allows you to play DOOM in the browser. Here is a silly blog post explaining how an XSS vulnerability could be used to achieve "DOOM execution" on Tesla.
To demonstrate how this works, follow this link to doom.pwn.life. The code is hosted here on GitHub pages.
If you ever want to demonstrate the possibilities of a XSS vulnerability (as shown in the blog post), you may make an inclusion of exploit.js like so: <script src="https://almroot.github.io/doom/exploit.js"></script>
. Please note that I take no responsibilities for your actions, make sure you have permissions from the website owner(s) before doing anything bad.