INCREDIBLE INTERFACE WITH 25 ADD-ONS

I installed the Omega v.21 to my GOOGLE ONN. box… but don’t remember HOW!
IF I remember correctly, it was only a 6 digit code on downloader…
BUT….
here’s the deal:
When I open Kodi, it automatically displays an interface with 25 add-ons already installed!
A pic of homelander or something like that is there, and you can side scroll to access them all, plus MOVIE category, or TV SHOWS category…
It’s amazing, and I want to install for my brother, but don’t remember HOW!
One stop “shopping” basically….
There was no need to install individual add-ons for hours on end….
Can anyone help me?