Does anyone know? On Android if that's applicable. I've got 6 left, not sure if I've unlocked any already.
Just found one:
Swashbuckler (3,000 pts)
Defeat 5 expert computer players in a single game of the Skull & Crossbones map or the Blackbeard's Wrath map
Global Gamer (1,000 pts)
Win 25 "Play Online" multiplayer games
The description is wrong though, you actually need to win 35 online games.