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