Has The 7th Guest entered the public domain?

I know that Trilobyte, the creators of The 7th Guest, went out of business some time ago. Has their work entered the public domain in some way? If not, who owns the copyright for their works?

Trilobyte has re-released the 7th guest for the iPad and the iPhone at the end of 2010. The second in the series "11th hour" will be released "summer 2011".

In November 2010 Trilobyte was resurrected, so that means they still have the copyright for the games.

In general, if nobody official has said that the game – or any of the materials associated with it – is Public Domain, it is not. Copyright simply does not work like that; someone will own it as it is an asset of either the developer or the publisher (or, these days, their creditors or people that the creditors sold it on to).