My working assumption is that OblivAeon destroyed roughly two thirds of the "countable infinity" of universes during that event.

     Canonical Universe -- This is the universe described by Christopher & Adam on the Letters Page podcast PRIOR to the ramp up to the announcement of Definitive Edition.

     Overlap Universes -- This is where various combinations of the "official" heroes/villains/environments appears, i.e. Sentinels of the Multiverse (EE), and the licensed expansions: The Cauldron and Sentinels of Earth Prime.

     Surviving Disparation Universes -- These are the canonical alternate realities that C&A have said (or implied) survived the OblivAeon event, including the Inversiverse, the Xtreme-a-verse, the Animalverse, the Vampverse, etc. (Confirmed destroyed were the Iron Legavy 'verse and the Telenovelaverse.)

     Sentinels Custom Playtesting Discord universe -- These are all of our universe where our heroes are (in many cases) the only heroes who exist there. Also included here is the SCPD Shared universe, an extra-canonical universe where various team-ups (Gun Club, etc.) and cameos occur, without regard to the canonical status of the characters involved (just like in real world comic book crossovers).

     Universe of the Alternate Freedom 5s -- All those weird combos of heroes above? These are the universes that they call home.

Zoomed in view of the Sentinels Custom Playtesting Discord individual universes. Not all of them have been pinpointed. The ones that have been indentified at the left were generally the people who were online the day that I was working on this image. Want to see yours identified here, ping me, and next time I'm updating I'll see about getting it added.

     Expanded view of the Universes of the Alternate Freedom 5. These 48 million universes are (highly) divergent timelines of the canonical universe where much different groups of heroes banded together to form the Freedom Five. The specific universe identified (PK3368-07) is the home of a Freedom 5 founded by Nightmist (SotM) along with Chrono-Ranger (SotM), Cricket (Cauldron), Dream Zero (Crisisverse), and Icegirl (miscellany by Johnny Guitar Watson). They were featured as the Happy Sentinels Tuesday image on 9 March 2021.

     The worlds are indentified by two consonents, a four digit number, followed by a hyphen and a number from 1-12 (always padded to two digits).

     The Rift will be explained ... later.