Here is the full list of all 18 Telltale Games' Poker Night 2 achievements worth 400 gamerscore.
You've won a million dollars.
Unlocked the Borderlands theme.
You've unlocked every poker item in the game.
Unlocked the Sam & Max theme.
Unlocked the Venture Bros theme.
You won a Personality Core. Try not to drop it down the incinerator.
Unlocked the Army of Darkness theme.
Are you now Character of the Year?
Sam's banjo is now yours.
Unlocked the Portal theme.
Purchased a set of chips.
Bought your first deck.
The Orb is yours, for better or for worse.
Purchased a felt.
You now own the scariest book in history.
Purchased a drink.
Won a tournament.
Won a hand.