No Mutants Allowed has a statement from Troika's Leonard Boyarsky with the first official confirmation that the developer has closed its doors, at least for the time being:

As many of you may have already heard, Troika has laid off all of its employees and is closing its doors due to our inability to secure funding for future projects.

We have not yet made the decision as to whether Troika Games as an entity will regroup and pursue future projects or simply cease to exist.

We want to thank all of our fans for their support these past seven years, it has really meant a lot to us that there were people out there who enjoyed our games enough to create fan-sites and follow our progress as a company. But we especially want to thank all of our employees - we had the pleasure of working with the some of the most dedicated, hard working, creative people in the industry, and we really appreciate all that they did for Troika.

Thanks for everything, Tim, Leonard, and Jason