Retro Gaming
Retro gaming is a race to save decades-old games from aging cartridges before they're lost for good.
Esports
A competitive scene where prize pools can top $40 million for a single tournament, funded largely by the players' own community purchases.
Game Streaming Culture
Twitch spun off from a general video site, got so big at watching strangers play games live that Amazon paid about $970 million.
Game Modding
Counter-Strike and DOTA, two giants of gaming, both began as community mods built on top of someone else's game.
Fantasy Sports
A hobby that's turned watching any random Sunday football game into something tens of millions of people have a genuine emotional stake in.
Speedrunning
A competitive scene built almost entirely around finding and exploiting the bugs a game's own developers never meant to be there.