If you downloaded source code files from the first link, then no, they won’t play or even be of use without the original game. You need binary executable files from that site, and not all the games listed have them. Many of those games are very old and won’t play on modern systems without extra steps anyway.
The other link should have useable games listed, at least for those that are still available, that list is a few years old.
Since we’ve had no explanation of the original ISO file, this thread is now closed. You can send a pm if you want any further input from me.