So at what point does a game become a clone?

[Laurel Aitken]

sales2099 said:
when it looks and plays similar. Simple enough criteria I guess.

This definition is way to vague. You could say Forza is a clon of GT according to this definition. IMHO, it doesn't needs to be just similar, it needs to take lots of elements, looks and feelings from the original.

I think PSABR is a clone. But LBPK adds enough content that could be considered a game of its own...