Sure, these days Capcom are true multiplatform developers, but for a while they, they were leaning 360. Dead Rising, Lost Planet, both were originally 360-only. So why did a Japanese developer make that call?
Capcom talisman Keiji Inafune - the creator of Mega Man, Onimusha and Dead Rising - explains that, despite a lot of internal pressure to avoid doing so, he felt that releasing games on the 360 was the best way the company could go about achieving healthy sales outside of Japan:
I think I can only get away with saying this now, but I really thought that the using the Xbox was only way to break into overseas markets, and I took that hypothesis all the way. In the end, I am very happy that I did so.
Considering both Dead Rising and Lost Planet sold over a million units early on in the 360's ifetime sales, and both were Capcom's first truly successful games aimed specifically at a non-Japanese audience, we're inclined to agree. And anyway, it's not like it matters these days. Capcom would port Lost Planet to the 3DO if they could.