[playworker]

Archive.org has a bunch of MS-DOS games playable in your browser, Lemmings is one: https://archive.org/details/lemmings_original_ms-dos_201705

[snvzz]

While that'd work, keep in mind Lemmings is an Amiga game.

MS-DOS is just one of many ports.

[_joel]

You'd need a amiga floppy compatible reader for the PC[1] and then use an emulator

[1] https://www.amigaforever.com/kb/13-118

[snvzz]

You'd need a floppy image. It's easier to just download one.

Amigaforever's KB is missing recent developments that make this very easy, e.g. GreaseWeazle.