The Guild of Thieves is an interactive fiction game by Magnetic Scrolls first published by Rainbird in 1987. The game also takes place in Kerovnia like the previous game The Pawn.
The player's character is "an aspiring member of the infamous Guild of Thieves" and is to steal all the valuables that can be found in and around an island castle.
The game features "extremely atmospheric" descriptions and 30 artistic renditions of key locations. Included in the game package are a faux newsletter of the Guild of Thieves titled What Burglar providing instructions and hints for the game, a Bank of Kerovnia Trading Account Card, a guild contract detailing the arrangement between the player's character and the Guild of Thieves and small dice.
Source: Wikipedia, "Guild_of_thieves", available under the CC-BY-SA License.