Take-Two has filed two trademark registrations for Agent, suggesting the publisher hasn't given up on the idea of releasing the Rockstar North game.
Sony announced in July 2007 that Rockstar was developing a new franchise exclusively for PS3, but further details, including the project's title, weren't confirmed until June 2009 to coincide with the platform holder's E3 press conference.
According to the official announcement: "Agent takes players on a paranoid journey into the world of counter-intelligence, espionage and political assassinations during the height of the Cold War at the end of the 1970s."
Little has been heard about the game since 2009, although Take-Two confirmed in May 2011 that Agent was still in development.
Spotted by Siliconera, the latest Agent trademarks were filed on July 18 with the US Patent and Trademark Office. Both marks refer to "computer and video game programs and software" as well as various printed materials like manuals and guide books, while one of them is for the title's logo.
The mark consists of the word "AGENT" with the shape of a handgun comprising the internal section of the letter "G".
In June 2011, Sony Computer Entertainment America CEO Jack Tretton cast doubt over whether Agent was still a PS3 exclusive.
Two months later, what appeared to be the first Agent screenshots surfaced online courtesy of an environment artist thought to be working on the project.
In August 2012, Take-Two CEO Strauss Zelnick was asked about the status of the game, to which he simply replied: "We haven't announced anything about that title."
Rockstar founder Sam Houser said at the time of Agent's 2009 announcement: "We have always enjoyed making action games, and with Agent we are making what we believe will be the ultimate action game.
"Agent is a game we have wanted to make for a long time. The team in Edinburgh is doing an amazing job combining intense action, atmosphere and story in a great period setting to create something that feels quite unique. We cannot wait for people to experience this game."