Walking a blue dog- I don't even remember the actual reference anymore but do the one thing
Scrooge- Win without ever buying or gaining treasure
Blue Dog -- IIRC, this would be "play Ironworks to gain something, then reveal Trader".
Scrooge -- not sure if that makes sense. Scrooge had lots of treasure, right?
OK, here are some ideas:
The Grass is Greener: Win with a deck that is more than 50% VP cards.
I Can Wait: Win a game where the opponent slowplays you. (Alt: Win a game that took over 30 minutes.)
Generous Friends: Start a turn with 10+ cards in hand before Durations.
Adventurous: Draw 2 Ventures with Adventurer.
Already Read Them: Set aside 5+ cards with Library.
Conspiracy Theory: Activate 3+ Conspirators in a turn.
An Acceptable Offering: Flip two different hybrid VPs with Tribute.
Ace in the Hole: Playing Wishing Well and wish for the Ace of Spades.
Goodwill Ambassador: Ambassador a Province or Colony to an opponent to win the game.
Tennis: Play Ambassador 20 times in one game.
Master Tactician: Discard your hand to Tactician
then draw more cards on the same turn.
Living Dangerously: Play Lookout after turn 20.
It's a Big Boat: Smuggle a Province.
Castaway: Island a Hermit.
I Know the Way: Topdeck two Treasure Maps in the buy phase with Watchtower or Royal Seal.
The Best Card: Gain Gold with Explorer on 5 separate turns.
Perfectly Minted: Trash 7+ Copper with Mint.
Silver Lining: Discard 3 Curses to KC-Mountebank.
Rip-Off: Buy a Peddler at full price.
It's a Big Horn: Gain a Colony with Horn of Plenty.
Not So Funny: Distribute all Curses without buying them in a game where Jester is the only attack.
Unfamiliar: Gain a Familiar without a Potion.Teetotaler: Gain a Potions card without a Potion.
Unfair Trade: Reveal Trader to gain nothing.
Cut a Deal: Gain 7+ cards in the Buy phase with no +Buy.
Defended Property: Forge 2 Fortresses into a Province.
Questionable Property: Forge 2 Rats into a Province.
Well OK Then: Play Band of Misfits as Feast to gain Band of Misfits.
Another Man's Treasure: Gain a Platinum from the Trash.
Joust: Trash 1+ Tournament and 5+ Knights.
[multiple names needed]: Win X games in a row.
[multiple names needed]: Lose X games in a row.