你们的猜测是对的：第一个解锁版是dev版！

ifelon

The Wrong Version of Dead Island Was Released on Steamby Chris Pereira

Update: Deep Silver has provided another update on the situation regarding both the PC and console versions of Dead Island. The version on Steam has been replaced with the correct one, so issues directly pertaining to that should be resolved.
As for the day-one console patch, that will unfortunately result in compatibility issues with existing saves. Updating your game may cause you to lose access to any save games you have, although this is mitigated to some extent by being able to go to New Game, picking your old character, and then using the Chapter Select option to skip ahead. It's obviously not an ideal situation and people are going to be angry, but it's better that the patch come now on launch day as opposed to a few days from now. The full list of patch notes have been appended to the end of this story, so scroll down to see what to expect.
Also of note is that the developers are aware of a bug involving The Ripper activation that comes from updating the game. This will be solved in a future update "coming soon." We'll have more details on that soon as well as about when the Bloodbath DLC (free for those who pre-ordered) is coming out.