Your rarest trophy

[Zkuq]

Percentage-wise:

Ace Port Royal Ace Port Royal

32,242 Achievers

7.84% Very Rare

I believe this is from LBP's Pirates of the Caribbean DLC pack.

As for the trophy with the least achievers:

Blazkowicz-ed! Complete all six episodes on Bring 'Em On! or harder

2,823 Achievers

13.75% Rare

It's from Wolfenstein 3D.