The service, titled The Rockstar Social Club, will allow users to gain access to leaderboards and performance-based competitions and awards. Players will register using their Xbox Gamertag or PlayStation Network ID.
Grand Theft Auto IV will be the first game to feature on the Rockstar Social Club and will offer players a virtual map and tracker of single-player data, a single-player leaderboard, a ranking of milestones achieved in the game and a Hall of Fame.
The site will also track the first players to compete the game and will send an 'ultra-rare' commemorative 'key to the city' to the first ten gamers to complete the title.
Rockstar also added that further competitions, leaderboards and challenges will be unveiled on a regular basis during the weeks and months following the April 29 release of the game.