Here is the full list of all 35 Avernum: Escape From the Pit achievements.
Deliver harsh vengeance to the cruel tyrant who sent the Avernites into the underworld.
Complete all three game-winning quests in Avernum and never set the difficulty below Normal.
Destroy the demon Grah-Hoth, making Avernum safe from his menace at last.
Have fifty potions made.
Learn 18 mage spells at level 3.
Dig up 40 caches.
Learn 18 priest spells at level 3.
Discover a route back to the surface world. There must be one somewhere.
Have ten potions made.
Find the secret at the bottom of Lost Bahssikava.
Avernum has five dragons. See if you can whittle that down a bit.
Purge a certain powerful demon from the Tower of Magi. Phew. Hope they stay out of trouble in the future.
Reform a legendary blade from Avernum's past.
Meet the Archmage Erika.
Find something that lets you fly.
Learn 6 mage spells at level 3.
Sss-Thsss will trouble Avernum no longer.
Steal the treasure from Gremlin's Gold.
Join the Scimitar.
Discover 50 locations of interest.
Learn 6 priest spells at level 3.
Get a dread curse. Then cure it.
Dig up 5 caches.
Slay 1000 foes.
Enter the Castle at last.
The mayor of Formello lost something of great value. Recover it.
Learn a priest spell at level 3.
Learn a mage spell at level 3.
Discover 10 locations of interest.
Slay 100 foes.
Open a secret door.
Purge a nefarious infiltrator from Silvar's sewers.
Escape the tunnels under Fort Avernum.
Complete all three game-winning quests in Avernum and never set the difficulty below Hard.
Complete all three game-winning quests in Avernum and never set the difficulty below Torment.