Here's a collection of playable through web browser games.
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Internet Archive: Digital Library of Free & Borrowable Books, Movies, Music & Wayback Machine
https://archive.org/details/internetarcade
https://archive.org/details/internetarcade
Does anyone know where to find other old internet games like mid-2000s? Miniclips games and whatnots.
The Internet Archive also has a collection of Flash games: https://archive.org/details/softwarelibrary_flash_games
(OP posted a collection of arcade games preserved by the Internet Archive, played with an emulator in the browser.)