The Plague of Shadows Title update for Shovel Knight: Treasure Trove has 20 achievements.
Finish the game. (Plague Knight)
Collect all Cipher Coins. (Plague Knight)
Purchase or unlock all relics equipment and upgrades. (Plague Knight)
Finish New Game Plus. (Plague Knight)
Clear the the Hall of Champions in 3 minutes and 30 seconds or less. (Plague Knight)
Finish any Stage without taking damage. (Plague Knight)
Finish the game without spending any money... including Cipher Coins! (Plague Knight)
Finish the game without collecting any arcana, bomb parts, or armors. (Plague Knight)
Beat the game within 1 hour and 30 minutes. (Plague Knight)
Destroy every possible checkpoint in the game. (Plague Knight)
Emerge unscathed from a battle with any Knight of the Order of No Quarter... except for King Knight! (Plague Knight)
Retake the Explodatorium without breaking any grey blocks during the boss fight. (Plague Knight)
Trade each of the useless relics to Chester. (Plague Knight)
Stay in the air for 10 seconds without landing on anything. (Plague Knight)
Defeat an Order Knight using only bomb jump explosions. (Plague Knight)
Give Oolong a sample of every explosion. (Plague Knight)
Finish any order of no quarter stage using 15 bombs or fewer. (Plague Knight)
Watch all of Mona's dance. (Plague Knight)
Finish the game without drinking any tonics. (Plague Knight)
Find Plague Knight's secret room. (Plague Knight)