Ripping Music from Games

I was wondering if anyone on this forum could write or link to a guide for ripping music from games (not soundtrack CDs), especially PS2 games. As many of you know OSTs usually don’t include all the music from a game and links to music are disappearing all the time often with no-one willing to re-upload them.

Basically I want to try and contribute, but I’m having a hard time finding out how to rip the files from the game discs. Any help would be greatly appreciated and hopefully rewarded with game music.