No. These are browser releases by the games’ own developers or publishers, not emulated copies of console games.

1 games · 1 playable

Call-A-Computer time-shared mainframe computer system games in your browser

Every game here was released on Call-A-Computer time-shared mainframe computer system and also has a version that runs in a web browser — a web port, a remake, a demo or a browser edition released alongside the Call-A-Computer time-shared mainframe computer system one.

No console and no emulator needed: the ones marked Playable start in a browser tab. Some open on the developer's own site, and the page for each game says which version runs on the web.

Playable
Highnoon
Western · 2008

FAQ

Questions and answers

Can I play Call-A-Computer time-shared mainframe computer system games in a browser?: Not the console versions themselves, but the games on this list each have an official version that runs in a web browser, so you can play them without a Call-A-Computer time-shared mainframe computer system.
Are these emulators?: No. These are browser releases by the games’ own developers or publishers, not emulated copies of console games.

Highnoon