2,301 MS-DOS games are now available on the internet archive and playable in the browser. The description block on archive.org is very humble:
Software Library: MS-DOS Games Software for MS-DOS machines that represent entertainment and games. The collection includes action, strategy, adventure and other unique genres of game and entertainment software. Through the use of the EM-DOSBOX in-browser emulator, these programs are bootable and playable.
Yeah, Wikipedia is an amazing use of the web but Oregon Trail!