Due to the anouncement of the developpement of the new Unreal Tournament by Epic Games, the lead of the Open Tournament project decided on general consensus to cancel the project and help for the new UT.
From the Unreal Engine 4 forums :
This project gets discontinued, Epic new Unreal Tournament is all we wanted from Open Tournament, so OT doesnt have a reason to exist now. The OT team and chat will still be there, for discussions and help regarding UE4. -vBlanco, lead designer of the OT project.
Sad news and bad luck for the timing, but with an official title, the project doesn’t answer to a need anymore. The team can now participate to the official project and help it become a better game, and that’s a good thing. Some of the mappers have already posted their work on the offical forums.
I’m comfident the start of a project like this may have been one of the reasons we have a new UT title in the work.