Early Access Release Dates
Currently IGDB's release date options don't allow for tracking both a game's initial early access release and the date at which it was declared to be in full release — e.g. Hades was originally released in early access for Windows on 12/6/18 and went into full release for Windows, Mac and Switch on 09/17/20. Currently, there can only be one Windows release date. Not only does this create ambiguity as to which date a page should go with, but ultimately both are valuable information and should be included on the page – there are contexts in which users will want the initial date, there are contexts in which they will want the 1.0 date, and there are contexts in which they will want to compare the two.
If desired, accommodations could be made for additional release date types as well (alpha, beta, multiplayer-only, etc)

Heya!
This is an excellent suggestion, and in fact something we’ve been wanting to have for a while.
It is in our backlog to indeed allow for more than one release date, early access is a great example but it is also applicable to other game status indeed.
No ETA, but absolutely something we will be looking at in the future!