I think you can use your Early Access key to get the full game... but not sure if it still works.
This way, you can play the game
waiting the Collector Edition.
Some changes regarding redeeming your key
In the past, we've said that launch will nullify your current Steam Early Access key and provide you with a new one for the full release of the game. This process has been amended and also applies to add-on versions of the game (i.e. for those of you who added a digital copy of the game to your original purchase).
IF YOU WANT TO PLAY D:OS ON STEAM, your Early Access code will remain active and you will be able to download the full version of the game using your current Early Access code.
