Oh, ok. My mistake. :D
To start (or make a game an exclusive at that point) would have been dumb. Pretty sure HS was exclusive before the PS3 launched. Also, from the sounds of it, the developer didn’t have a whole lot of options other than Sony, which is clearly not going to publish anything for any other system. If the choice is exclusive to Sony or nothing, well I’m not sure that’s much of a choice.
I think it was actually shopped around way before the PS3. I do think you’re right that Sony was the only one that picked it up.
Heavenly Sword began development in 2002 with footage of the original PC version published on TeamXbox.com in 2004. It had, at one time, been up and running on an early Xbox 360 prototype, but this was abandoned in favor of the PlayStation 3 when the title was picked up by SCEE.
this thing was advertised constantly in the careers section of edge/gamestm.