Here is the full list of all 22 Bardbarian achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Start a new game in Insane Mode.
Unlock the mythical 4th party slot.
Complete the "night" chapter.
Fact: There are 1609 meters in a mile.
Loot 100,000 gold from the corpses of your fallen enemies.
Send 2500 enemies to their grave.
Last for 3 minutes in survival mode.
Go as fast as you possibly can. (Hint: Upgrade + Song)
Complete the "evening" chapter.
Complete the "noon" chapter.
Something's cooking on the title screen.
Waltz into Wave 10 and rescue him from that Fire Golem.
Don't get hit!
Appears randomly in Survival mode. May luck be with you.
Upgrade a unit to MAX level.
Reach 3000m in Escape mode, and he's yours.
You look lonely, have you considered a pet to keep you company?
Play and submit your best time for Survival Mode.
Complete the "morning" chapter.
Complete the entire campaign from start to finish without dying.
Do all the things! 100% Completion.
Post a score in the Day 2 Insane Mode leaderboard. The most exclusive of all leaderboards.