What would be the point? The previous standard DSM never included games since the evidence wasn’t really substantial, and the current standard by ASAM is that basically anything is addictive because it’s not about the substance, or even how much you participate in it, but how the brain perceives rewards.
1. QUESTION: What’s different about this new definition?
Answer:
The focus in the past has been generally on substances associated with addiction. This new definition makes clear that
addiction is not about drugs, it’s about brains. It is not the substances a person uses
that make them an addict; it is not even the quantity or frequency of use. Addiction
is about what happens in a person’s brain when they are exposed to rewarding
substances or rewarding behaviors, and it is more about reward circuitry in the brain
and related brain structures than it is about the external chemicals or behavior that
“turn on” that reward circuitry. We have recognized the role of memory, motivation
and related circuitry in the manifestation and progression of this disease.
https://www.asam.org/docs/default-document-library/20110816_defofaddiction-faqs.pdf
tl;dr: Games aren’t addictive, they are (one of many) means addiction is expressed.