Persian Gorgrinder, there's another official release still missing in the 1st post:
https://www.discogs.com/release/14668006

Mayhem - Live in Montreal
From
The True Mayhem newsletter:
"Digital single - recorded live 20.01.2017 in Montreal, Quebec @ Club Soda during a De Mysteriis Dom Sathanas set."
Also, the discography until 1987 have to be listed in this way, in my opinion:
Mayhem - Pure Fucking Armageddon [demo] - 1986
Mayhem - Deathrehearsal [demo] - 1987 (it's a semi-official release, though...)
Mayhem - Deathcrush [demo] - 1987
Mayhem - Deathcrush [ep] - 1987