Is there a secret mission in Heart of the Swarm?
In Starcraft 2 - Wings of Liberty there was one hidden mission (details here), does Heart of the Swarm also contain a hidden mission, and how do you get to it?
Having completed the campaign and gone through the achievements I will say there is no secret mission in Heart of the Swarm campaign.
The game consists of 20 missions where some of them have an optional order and 7 simple evolution missions that each let you choose 2 directions to evolve a unit.