Several indie developers have taken on the challenge of recreating the Aincrad experience across different platforms.
Disclaimer: Sword Art Online and its characters are property of Reki Kawahara, ASCII Media Works, and Aniplex. This fan game is not endorsed by any official entity. Please support the official release. Sword Art Online Levels -Fan Made Game- download
If you want to support the creator, tip them via Ko-fi or Patreon. Do not pay for "premium download links"—those are scams. Several indie developers have taken on the challenge