In like, 2005-2010ish I remember there being these awesome online games through sites like Mini Clip. All disappeared from the internet.
I understood it had something to do with Java? Or… some plug in? I don’t really understand what either of those mean.
What happened to online games?
I'm going to go against the grain a little here and say you may have just grown out of it. A lot of kids have access to Chromebooks through their schools (at least in the States) and you better believe they know exactly where all the online games are.
And they got some really cool experiences we could never dream of. There are now several full games running in browsers, with 3d acceleration and everything. Play-cs or wipeout off the top of my head, but also a lot of older pc arcade and console games on archive.org and new originals on itch.io