A Sacred Urn is an item in Problem Sleuth and Homestuck.
In order to increase your score, you'd have to hunt around in the game and look for these urns to topple over. Problem Sleuth didn't really get to topple any though, as none of the urns were ever found.
In Homestuck, a Sacred Urn containing the ashes of Nanna Egbert sits on the mantle of the fireplace in John Egbert's living room.
Trivia[]
In Problem Sleuth, the three ways
for the characters to score were increasing the number of "Sacred Urns Toppled" (for Ace Dick), "Mystic Ruins Desecrated," (for Problem Sleuth) and "Hallowed Tombs Defiled" (for Pickle Inspector). These parallel the actions of John, Jade, and Rose in Homestuck, respectively. Spades Slick's "clocks destroyed" counter (
) is also likely an allusion to this.