DJ Hero, whose initial sales figures reportedly numbered just 122,300 across four platforms, has now sold over 1.6m copies with sales spiking around price drops.
Speaking to VideoGamer, Jackson said: "We're at over 1.6 [million] now which is cool. If anyone had said to me when I was starting my career in the industry that you'd work on a game that sells that many copies and it would be considered a failure I'd have said, 'Are you f**king mad?' And I still probably stand by that now.
"We definitely had spikes around when there were price drop. My own personal opinion is that it was too expensive when it was first released and we're addressing that this year - [DJ Hero 2]'s going to be cheaper when it comes out this year."
He added: "The slightly unfortunate recession was kind of, not necessarily out of the blue, but for a lot of people it was out of the blue so, you know, people were suddenly watching their pennies and then the game came out and one, it was new and two, it was expensive."
DJ Hero 2 is due for release on October 22.