On December 25th, the source files of GTA 5 were leaked, revealing mentions of DLC, an old map, and several screenshots of an early version. In the leak, files related to other company games were also found. Among them was a possible map of one of the locations in Agent, a canceled spy action game by Rockstar Games.
The cancellation of Agent was revealed by Obbe Vermeij, the former technical director of Rockstar North. He also mentioned that the project was supposed to be a spy thriller in the style of James Bond, set in the 70s in various countries around the world. Additionally, as a reminder, the source code revealed mention of the unannounced Red Dead Redemption 3. More details about the leak can be found in a separate news article.