EA CEO John Riccitiello has revealed that the video games giant is still struggling to compete with Nintendo's dominance on the Wii, claiming sales of Nintendo software accounts for two-thirds of the console's total software sales.

"For those of us making console games, that's a challenge that we certainly have to contend with," said Riccitiello during today's investor call.

There have been some EA successes on Wii, notably Boom Blox and MySims, but Riccitiello added: "There's no question that having the lead platform be a platform with two thirds of the unit sales occurring to the first-party owner is a really unusual thing. We haven't seen that since prior to the [original] PlayStation."

He concluded that EA's "home territory" remains the PS3, Xbox 360 and PC and noted "we've got work to do on the Wii".