SD2/SD3 themes make appearance in this order:
1. Angel's Fear (SD2/SD3)
2. the bassline from Secret of Mana (SD3 track 3.03)
3. Into the Thick of It (SD2)
3. Steel and Snare (SD2)
4. Ancient Dolphin (SD3)
5. Meridian Child (SD3)
6. Return to Forever (SD3) [the third part, which starts around 4:10; also, the melody is slightly based on The Wind Never Ceases from SD2]
The rest seems to be either original or evolved from base chord progressions/rhytmic figures/ostinatos from either score. The anthem at the end is definitely original. Anyway, this was compiled through a dry listen, so it may not be comprehensive. Someone else will probably chime in if I missed anything.
