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