The term "archive" can mean two things: a physical museum collection or a digital repository of ROMs and ISOs. For the PC Engine, the digital archive is the only hope for survival.
An archive is useless if you can't play the games. Here are the modern methods. pc engine cd rom archive
Because of copyright laws, I cannot link directly to ROMs. However, the following repositories are well-known in the preservation community (use search engines or the Internet Archive's "Texts" section): The term "archive" can mean two things: a