The PlayStation 2 outsold the PlayStation 3 and PlayStation Portable during Sony's first quarter, according to the firm's fiscal report.
Both current generation platforms saw a decline in sales from the previous quarter, with the PS3 dropping from 1.6 million units to 1.1 million, and the PSP falling from 2.1 million to 1.3 million.
The ten-year-old PlayStation 2 was the only Sony platform to experience a sales increase during the quarter. The console sold 1.6 million units, up from 1.4, with analysts attributing this to a recent price drop.
Software sales for all platforms saw a decline. The PS3 sold 14.8 million titles, dropping from 18.9 the previous quarter. PSP sales fell to 8.3 million, down from 11.2, while PS2 software came in at 8.5, down from 11.3.
PlayStation 3 sales are expected to rise during the next quarter, with the platform's long-rumoured price drop due later this year.