My Abandonware offers a free download of Arkanoid. This is a legitimate resource website specializing in providing classic game downloads.
Download Link: https://www.myabandonware.com/game/arkanoid-ek

Online Play

If you prefer not to download, you can opt for online play:
OldGames.sk provides an online version of Arkanoid, playable directly in your browser.
Online Play Link: https://online.oldgames.sk/play/arcade/arkanoid/9944

Other Platform Versions

Arcader.com offers an online version of Arkanoid for the NES.
Online Play Link: https://arcader.com/arkanoid/

RetroGames.cz provides an online version of Arkanoid for DOS.
Online Play Link: https://www.retrogames.cz/play_039-DOS.php

Important Notes

Ensure that you comply with relevant laws and regulations when downloading and using Arkanoid, and respect copyright.
If you need other versions (such as MSX, PC-88, etc.), you can refer to the platform information in the above links.