If you did no missions and only the story, this theme first plays when Aerith escorts Zack from the church to the sector 5 markets. It's pretty cool to see how Aerith became who she was meant to be through this experience! This song also plays in most if not all the missions in the slums. For the 'Master Blender' achievement, I found it easier for me to simply count the number of drips visually rather than listening. For the 'Bingo!' achievement, use the number that Aerith gives you and the number that the boy says are good. That will either end up with 50% or 100% chance of success depending on whether Aerith and the kid pick the same number once or twice. For the 'Godlike' achievement, use the sprint and make sure to rotate your camera as you're running so you get a good visual of the materia. Try enough times and you'll get it. Now the 'Good Match For Aerith' achievement is a doozy (as you can see it was my final achievement for 100%), but basically you have to maximize her affection towards Zack. Save before you go to the park and if Bruno doesn't say you're a good couple, reload the game and play the fragrance minigame with a perfect score until you start getting Aerith to say the alternate dialogue. If you miss the perfect score, reload because if you get less than a perfect score, apparently you actually might lose affection points. I found that when I did that, I was only 1-2 perfect blends away from the good match achievement. Be patient because trust me it will require a ridiculous amount of patience. You can purchase Crisis Core Final Fantasy VII Reunion here: https://ffvii.square-enix-games.com/en-gb/games/crisis-core/#buy-now As of the release of this video, no official soundtrack for Crisis Core Reunion has been released (to my knowledge). Buy the original Crisis Core soundtrack here: https://music.apple.com/us/album/crisis-core-final-fantasy-vii-original-soundtrack/266734037