In 1997, sony computer entertainment america launched a cd based magazine that doesn't make you read but makes you play called the playstation underground. the psone versions always spanned 2 discs which were great for playable demos, trailers, imports, behind the scenes featurettes, exclusive first class looks on upcoming games, cheat codes, bulletins, demonstrations on first party accessories, downloading save files, walkthroughs on best winning the game, special events and easter eggs. the ps2 version was just one dvd. it all ended in 2001 when they've decided to merge with the official us playstation magazine just as they've transitioned to playstation 2 demo discs and they continued until 2007. they also did an assorted variety demo disc called the jampack. it'll be good for you to riff the psone and ps2 demo discs as in playstation underground, official us playstation magazine and playstation underground jampack because nobody cares about how those games were made anymore.

http://www.giantbomb.com/playstation-underground/92-993/
https://psphardcore.blogspot.com/2016/10/summary-of-playstation-underground-cd.html
https://en.wikipedia.org/wiki/Official_U.S._PlayStation_Magazine
https://en.wikipedia.org/wiki/PlayStation_Underground
https://en.wikipedia.org/wiki/Jampack