Well Stiletto I looked into the Predators game and eventually did find an article quoting one of the developers saying that the game was NOT vector. He was responding to the widespread belief that the game was vector which was based on the claim of one of the other developers, whome he says is mistaken.
With the lack of good information and material evidence I'm not sure it really matters how we classify this game. Doesn't it still appear that the game was INTENDED to be vector at some stage of development? Was development of the game ever actually completed? .. Predators is only listed as a prototype on our list.