Murder in the tool library

Edit: actually they feature even more prominently in the sequel #Missing Mermaid, where the investigators interview a full time gamer and possible witness who was streaming some kind of dark souls sequel near the dissapearance/possible kidnapping.

Also the rulebook for the TTRPG Fully Automated specific mentions that playing videogames full time is an accepted lifestyle in their post-scarcity society, and the contacts character stat tracks online contacts independently from offline, so you can make a character who has no Internet presence, or who lives entirely in games and basically only makes friends through videogames, or anywhere in between.