Super Turbo Turkey Puncher 3
Super Turbo Turkey Puncher 3 is the easter egg in Doom 3. Not "any" - the! Right at the beginning of the game at the cafeteria, there is a computer within the game itself where you can play this mind-blowing block buster!
Since it is very well-known, I would have expected it to be already cloned and remastered numerous times. But in fact, no one seemed to have rebuilt it in either Flash, HTML, as executable or otherwise. At least, I didn't find a clone online. So why not do it myself then?
You can also play it right here
The game is embedded in an iframe down below. Since it's very client-side and heavy on browser features, you may experience issues with less common browsers or mobile browsers. The game is tested in Google Chrome, Firefox, Internet Explorer and Edge.
Like, you know... "game".