Here is the full list of all 45 The Barbarian and the Subterranean Caves achievements.
Visit the main menu screen
Outsmart the priest.
Get all achievements.
Frighten the hostess of the tavern.
Sometimes it is vital to know how to read.
Sell the old ring at the highest price.
Don't show what you've got in the sack.
Frighten your opponent.
Do not underestimate your opponent.
Become the involuntary accomplice of a monster.
Win a dice game.
Discover more about the announcement from a citizen.
Give the villain a powerful artifact.
Look carefully at the drawing carved on the wooden floor.
Stay sharp and be careful looking for an expensive trinket.
Think up where to get the coin.
Outdrink the chamberlain.
The monster roars and you feel yourself tricked.
Pay the priest for the merchandise.
Steel something valuable from the priest.
See how it cries.
Allow yourself to drink some more wine.
Find and catch the monster.
Eavesdrop on a conversation.
Find a lair of subterranean dwellers.
Find an old ring.
Find a tunnel with a "fanged maw."
Find a tunnel that ends with a precipice.
Read the announcement all about you.
Choose gold.
Spend a night with a beautiful girl.
Beat the villain with his own weapon.
Keep the mighty artifact to yourself.
Go after the money.
Try to fight your opponent only with the sword.
Meet Gorro.
Scare the chamberlain.
Find out what happened to the merchant who you sold the medallion.
Get a reward from Abu Ali for the job.
Kill the monster in the cave.
Even in a dark cave there is someone who'll take care of you.
Find a tunnel blocked by stones.
Visit a beautiful grotto.
Get acquainted with Abu Ali.
Read an announcement.