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