Here is the full list of all 35 Avernum 3: Ruined World achievements.
You have won the Avernites a home on the surface.
You got past the alien beasts.
You've dealt productively with the queen.
Get five priest spells to level 3.
The golem factory was shut down.
The troglos and giants won't be a problem now.
You've looted the giant treasury.
Find 50 outdoor locations.
You've read 15 books.
The mad priest of the troglodytes has fallen.
The bugs were squished.
The slime has been mopped up.
You've finally returned to the surface.
You hunted down three monsters for a bounty.
You found one of the great artifacts of Valorim.
You won Avernum 3: Ruined World on Normal difficulty.
You won Avernum 3: Ruined World on Hard difficulty.
You won Avernum 3: Ruined World on Torment difficulty.
Get the blessings from five stone circles. Glorious gifts await!
You've found 8 of the Xian items.
Craft five nice magic items.
Have 12 potions made.
Find 150 outdoor locations.
Get five mage spells to level 3.
Get ten mage spells to level 3.
Get twenty mage spells to level 3.
Get ten priest spells to level 3.
Get twenty priest spells to level 3.
Sanctify five altars.
Dig up 50 caches.
Join the Anama!