If you are playing the classic version on a modern PC, these community tools are highly recommended:

While is not officially "free-to-play," it is readily available for purchase on modern digital storefronts and can sometimes be found as a "free" inclusion in gaming subscriptions or legacy archives. Where to Find the Game

: Full disc images are hosted on the Internet Archive for historical preservation.

: It has previously been offered for "free" to Xbox Live Gold members. Essential Modern Fixes