I notice you mentioned a paper titled — but I should clarify that this doesn't appear to be a standard academic or peer-reviewed publication.
However, the keyword changes the game. While standard Unblocked Games 77 sites aggregate popular flash and HTML5 games from the public domain, the "Exclusive" label usually refers to: unblocked games 77 exclusive
The branch operates differently:
The edition, however, is the premium tier of this concept. It refers to a curated collection of games that are not available on the standard mirror sites. These exclusives include: I notice you mentioned a paper titled —
Genuine unblocked game sites play directly in the browser; never download or unknown files from these pages. Institutional Policy: It refers to a curated collection of games
The number "77" is a specific branch of this ecosystem. Much like its cousins (66, 99, or 76), Unblocked Games 77 became famous for its minimalistic design and massive library of browser-based games.