I created this thread to be able to share the retroarch cores among the whole steamlink community. We could upload them to google drive or mega.

I start myself uploading a new core

AMSTRAD CPC - CrocoDS

https://mega.nz/#!8U5FlAiB!UCg3iA5Q7b-d6XFnqgA7NAvw_K7mnPegEbQ6vrX-_Vw

MSX and MSX2 - fMSX

https://mega.nz/#!1QZ3WIjB!1JBrTT6XcIj9QLgDrJnMIsSk5IHZ_XlFzojItm2zKWM

Game and Watch - GW

https://mega.nz/#!8QRBVYZI!muvglLyKdfDsqkPynBXRPkaHBMeqftgwgLyGnsEAsnc

This is a core of amstrad cpc, I've tried it and it works perfectly.