Here is the full list of all 8 Libra of the Vampire Princess: Lycoris & Aoi in "The Promise" PLUS Iris in "Home achievements.
Selected Aoi & Lycoris episode
Shut down game first time
Selected Iris episode
Started game first time
Played game 1 hour
Played game 10 hours
Cleared Aoi & Lycoris episode
Cleared Iris episode