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