Here is the full list of all 80 Astrea: Six-Sided Oracles achievements.
Reach max level with Moonie.
Enhance an enemy die.
Reach max level with Cellarius.
Defeat Astrea at Astrea Level 3.
Defeat Corrupted Sothis.
Win a run at Anomaly Level 3.
Reach max level with Austra.
Defeat Astrea with all Oracles.
Defeat Astrea with Sothis.
Defeat Corrupted Orion.
Defeat Astrea with Orion.
Activate Astrium 4 times in a single turn.
Win a run without any Epic die on your dice pool.
Reach max level with Hevelius.
Win a run with two Sentinels on max level.
Win a run without owning any Sentinels.
Win a run without any Blessings.
Win a run with at least 15 Blessings.
Reroll the same die at least 5 times in a single turn.
Prevent a Heart loss using Wave.
Win a run with only one type of dice other than Starter dice on your dice pool or with only Starter dice in your dice pool.
Win a run with 10 or fewer dice on your dice pool.
Defeat Astrea with Cellarius.
Defeat Corrupted Austra.
Defeat Astrea with Moonie.
Make an enemy defeat themselves.
Defeat the Corrupted version of yourself.
Defeat Corrupted Moonie.
Defeat Astrea with Austra.
Defeat Corrupted Hevelius.
Make a creature receive at least 100 Purify in a single Purify instance.
Score at least 3500 points in a run.
Defeat Astrea with Hevelius.
Defeat Astrea.
Defeat Astrea Avatar.
Open Astrea's Heart.
Defeat Corrupted Cellarius.
Win a run with at least 50 dice on your dice pool.
Reach Astrea's Heart with Orion.
Reach Astrea's Heart with Sothis.
Defeat Decayed Star.
Spend at least 1500 Star Shards in a single run.
Reach Astrea's Heart with Austra.
Dodge 4 Corruption in a row.
Win a run without losing Hearts during battles. Sacrificing a Heart at Shrines doesn't count as Heart lost.
Defeat Corrupted Assembler.
Reach Astrea's Heart with Hevelius.
Score at least 2000 points in a run.
Reach Astrea's Heart with Cellarius.
Own a Sentinel on max level.
Defeat Sanctuary Parasite.
Defeat Uncaged Anomaly.
Reach Astrea's Heart with Moonie.
Forge a die.
Defeat Doomed Astronomer.
Play at least 10 dice in a single turn.
Defeat Smoldering Beast.
Acquire a Sentinel.
Win your first battle.
Save Meissa, the Antiquarian.
Defeat a boss on the first turn.
Score at least 7000 points in a run.
Win a run at Anomaly Level 8.
Reach max level with all Oracles.
Obtain all other achievements.
Win a battle with at least 20 Plague Hex die in your dice pool.
Deal infinity Purify.
Play at least 20 virtues in a single turn.
Repair or Reactivate Sentinels at least 20 times in a single battle.
Have both your Sentinels with 4 types of Link.
Acquire 12 different type of Sentinels in a single run.
Deal 50 Purify with a Safe die.
Play a die with at least 50 Confuse on an Enemy without any Confuse percentage modifier.
Reach max level with Sothis.
Have at least 20 Soul Heat.
Have at least 30 Chanting.
Have at least 4 creatures with at least 15 affliction.
Reach max level with Orion.
Win a Ground Zero battle without moving your Orbs.
Move your Orbs 50 times in a single battle.