Sierra, Sierra, Sierra, Sierra, LucasArts

Looking glass studios, troika, black isles, ion storm, old school LucasArts.

I think hudson soft is gone too .. they swallowed up by konami

westwood

Ensemble Studios should've made the list.

Best damn studio to have ever gotten the ax.

Clover Studio still exist as Platinum Games - most of Clover emplyees if not all of them went to Platinum Games.
no Cryo Interactive make this list fail -their adventure games alone were awesome and then there's MegaRace series.
i though bout NovaLogic, but apparently they are still in the business - damn why are they only doing pc games? their shooters and flight simulators were always friggin sweet and i would love to see Delta Force game on 360.

Delphine software, those games were amazing for their time and very different