Here is the full list of all 17 Regency Solitaire achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Beat the game in Hard mode.
Get a 5x multiplier.
Make a combo of 35 or higher.
Beat the game in Normal mode.
Purchase all of the ballroom and costume upgrades.
Save up 25000 gold without spending it.
Get 10 perfect hands in a chapter.
Win 6000 gold in a single chapter.
Find the silver teapot.
Use all 3 cameo powerups in a single hand.
Make a combo of 20 or higher.
Reach chapter 7, set in London.
Win 5000 gold in a single chapter.
Get a 2x multiplier.
Fill up the fan with wildcards/jokers.
Earn 20 stars in a chapter.
Make your first combo.