For people bored at work, I uploaded all of the games from the Submachine series. Yes, they are flash games, but they are some of the best I have ever played. Plus, they're hosted on my site, so it's unlikely they are blocked at your place of employment. I should note that all of these games were created by Mateusz Skutnik, and also that he plans on releasing a Submachine 6 at some point. Check them out.