Once, many moons ago, a group of devs at my old work got deny on internal zone-to-zone Firewall open request that they needed for integration between two internal systems, so they ended up making a script that e-mailed the info to a hotmail.com (SMTP was open) account and then wrote a script to login and screenscrape the mail info from hotmail back to the other server (https was open through surf proxy).
My top 5 would be:
World of Warcraft (easily over 10k hours, been playing since release)
EVE Online
Crusader Kings
Stellaris
Blood Bowl