Yeah, the @ was a result of typing HW2:2 too fast several times and then just deciding to go with it.
The replies here have been great, made me smile quite a bit reading them. After posting it I was kicking myself for not thinking to do a spin on the full title of Dwarf Fortress, "Slaves to Armok: God of Blood Chapter II: Dwarf Fortress". Slaves to Hodor, etc...
Though, like much of comedy, this joke was based in truth. We've been considering a rename for a while, mostly for reasons outlined humorously yesterday. Most search engines will ignore both @ and At in a search, so searching for it on the steam workshop is pretty futile. It's a bit of a problem, but we haven't selected a single alternative yet. Renaming a project you've been working on for 8+ years is hard.
Edit: I don't actually mind the hank hill references though