Akasen
Augur
It is very uplifting to see Kojima and co just sit there and show off a game based on its gameplay at all times possible.They seem to go with everything that's fun in the design. I'm intrigued after watching all the demos because I avoided those 40 minute videos in fear of just seeing some of those lengthy cutscenes typical for the series. To my surprise there is no cinematic animation disturbing the gameplay in those demos unlike most of modern games. All that sticks out is the slowed time after being discovered.
The slow down when caught is called "Reflex Mode". The abstraction is that Big Boss has the reflexes to immediately just shoot a guy in the face with whatever he has on hand (Or throw a rifle magazine at their this. This is not a joke. This knocks out the enemy). The technical reasoning as I understand it is that the game becomes very difficult overall without this mode because you are traversing large and open terrain and may not have a certain awareness of where the enemy is. This is also couple with the ability to mark enemies like in so many other games so you can see the enemy behind walls and the map.