The main opposing argument is that relying on "gaming addiction" as an illness could obfuscate underlying issues such as depression or social anxiety. Gaming companies such as Microsoft point to existing tools, such as parents being able to set screen time limits.
"There is a lot of misunderstood or incomplete sets of information out there," Dave McCarthy, the Xbox head of operations, told the Telegraph.
"Once we ... do things like better research, we're going to make more informed decisions collectively as an industry and a society."
The WHO also voted to include professional burnout among its recognised illnesses, which it defines as "a syndrome conceptualised as resulting from chronic workplace stress that has not been successfully managed".
The updated classification, which takes effect in January 2022, also removes transgenderism from its list of mental disorders, reclassifying it under the chapter on "conditions related to sexual health".