[chunky1994]

While it does seem like a matter of semantics, in the end, whether something is classified as an addiction or a dependance doesn't seem to be as binary as "has a biological response to removal of said substance".

I'd argue that since we do have dopamine/seretonin driven reward systems, anything that modifies a physiological expression of the neuro-chemical lifecycle from pre-exposure to post-exposure (whether that be density of receptors, abundance of neurotransmitter, some yet unknown neurochemical expression), then that substance can cause addiction.

Video games could do this, just not as dramatically as heroin, but given that modern day life is basically just a hamster wheel of our neurochemical systems, anything has the potential to be addictive as defined above, it all depends on where on the spectrum of addiction said substance lies.