This was to be expected given its fall retail date, but she added its "full lineup" will be on display too. Hopes for "great titles" from third-parties.
"We have very strong first and third-party developer support" for Natal said Mount, speaking at the Jefferies Annual Global Technology Conference in New York City, reports IGN. Microsoft's best designers have been put on task for Project Natal.
At the Tokyo Game Show last year they said studios "actively working" on the motion platform included Bethesda, Electronic Arts, and Square-Enix. The list of participants has grown to over 70 percent of publishers since January.
Mount said that "part of the reason" they unveiled Project Natal "as early as last summer" was so "we'd have time to get kits out and get the entire game developer community developing games for it." This E3 will have the full line-up of Natal titles.
"As a history, Microsoft works very strong with third-party developers, so we're hoping that we're going to get some great titles from that," she said. "You'll be able to see more news about that this summer at E3. We'll show you the full lineup."
Fable III from Lionhead Studios is confirmed to support Project Natal and is releasing exclusively to Xbox 360 this fall, while Halo: Reach from Bungie will not. Aside from Lionhead's other project, Milo & Kate, no other title has been confirmed for Natal.
E3 2010 runs from June 15th to the 17th - three of the biggest days for games.