I'm bored, so I'm working on this.
First thing to note. 007 World is not enough for PS1 is actually a different game than 007 World is not enough for N64.
Would you say that Castlevania SotN is not exclusive because it was ported to XBLA on 360? Mind you that it did receive a physical release through the Konami Classic Collection Vol 1 or 2.
Also, further... Do handheld versions count? Asteroids was released on GBC and PS1, so is that considered exclusive? Yes, Asteroids in general has been released on tons of platforms, but this specific release was only on PS1 and GBC.
My opinion is that all of these count because different games, remasters/remakes/etc are different games, and handheld's are wildly different from console releases.
This is highly entertaining and educational. I just found out that Ballistic was released for PS1 and Nuon.
I assume games also released on platforms like Neo Geo CD, TG-CD, and Jaguar CD shouldn't count since technically that is a competitor... but I'm also like "Are you really a competitor tho?"
I think this is why this list doesn't exist, there were TONS of platforms competing before it was just DC/PS2/Xbox/GCN
Regardless, I'm making notes. Like I don't know if I should remove Battle Arena Toshinden 2 because Battle Arena Toshinden URA for Saturn is basically an upgraded version of BAT2 not unlike Sculptor's Cut is to 63 1/3rd. But I've noted that in my list.