It kind of sucked that I had to buy this game again (I've got the 4 disc set right next to me) but at least I know it will work. In any case this is probably one of the most pivotal game of my childhood.
Indigo Prophecy... it was a unique game for the PS2 and Xbox with Heavy Rain as it's spiritual successor. I bought this last year on Steam but it didn't want to work, but perhaps because the stars are aligned the right way, the game is working now. It's been harder getting use to the controls again, I even had to remap a few because they were ridiculous where they were. Overall it's just as fun as it was once I started getting into it, and I'm finding out all sorts of things I didn't know, like if you decide to drink a lot of alcohol in your apartment, then take some pain pills, you die.