RuneQuest has (for me) a winding path of editions and publishers, at least in comparison with other rpgs. Adding the Glorantha setting to the mix doesn't make it easier.
The last RuneQuest from The Design Mechanism was RuneQuest 6th edition, and, as far as I know, according to Chaosium, this iteration follows RuneQuest 3rd. Also, I've read about as RuneQuest and as Roleplaying in Glorantha, and RiG is an acronym I've seen around, but it doesn't tell me anything about the edition!
So, is this RuneQuest 7th edition? 3rd edition?