Responding to GTA 5 requests in an online Q&A session, Rockstar said that the project was going well and that more assets would be released soon, before unveiling two new screenshots.
"We are very busy working on the game! Everything is going well, but the game is a huge project. We should have more information and some new assets for you soon," writes Rockstar.
The studio then told fans to ignore speculation and unofficial videos, that there would be no beta testing for the game, and that it might be a while before the title is shown off in full.
"As we have said before, we have often had long gaps between asset releases on previous games and will continue to do so in the future.
"We are sorry if you find this frustrating, but please understand, we don't do this because we 'don't care about our fans' 'don't respect our fans' 'hate GTA fans etc' – precisely the opposite!
"We do it because we want to make sure we only release 100% correct information, and because we want to keep plenty back for the actual game release so there are still lots of surprises when you play it.
"The only things we care about are that you enjoy the experience of actually playing the game and that we release accurate information. We just have not been in a position to show more of the game than the trailer and will not be for a while yet.
"One thing we'll say definitively though is – there is absolutely no 'beta' test for the game. If you see ads or solicitations to join a beta programme, beware as this could be a dodgy online phishing scam. Your best bet is to only trust information as official if you're seeing it announced here at the Rockstar Newswire."
Announced last year, Grand Theft Auto 5 takes place in the city of Los Santos and its surrounding hills, countryside and beaches. Its lead character is thought to be a man named Albert De Silva, played by Ned Luke.
The game has been tipped for an October release, following a leaked developer CV.
However, analysts have suggested that even a 2012 launch would be unable to save a poor year for video game sales.
> Grand Theft Auto: Most memorable missions
Watch the Grand Theft Auto V announcement trailer below: