There are no real gaming or device or brand communities.

Some relatively active (in terms of posts, breadth of content and user engagement) gaming communities across Lemmy/Threadi:

• Adventure Games - !adventuregames@retrolemmy.com
• Automation Games - !automationgames@lemmy.zip
• Cozy Games - !cozygames@lemmy.world
• City Builders - !citybuilders@sh.itjust.works
• Indie Games (variety) - !bside@fedia.io
• Lifesim Games - !lifesimulation@lemmy.world
• Open Source Games - !foss_gaming@lemmy.world
• PC RPGs (cRPGs) - !crpg@lemmy.world
• Roguelike Games - !roguelikes@lemmy.world
• RTS Games - !rts@reddthat.com
• Space Games (variety) - !space_games@piefed.world
• Strategy Games - !strategy_games@piefed.world
• Turn-based Strategy (e.g. 4X) - !turnbasedstrategy@piefed.world
• Tycoon / Business Sim Games - !tycoon@lemmy.world
• Video Game Art - !gameart@sopuli.xyz
• Video Game Music - !vgmusic@lemmy.world
• Video Game Questions - !askgaming@piefed.social

I moderate/curate like 6 of them, so I am biased, but we do have a solid selection of gaming communities beyond !games@lemmy.world or !pcgaming@lemmy.ca.