Howdy, this is a message explaining that we decided to open an HMS Marulken forum where you can create new threads with questions about the game, where each thread is about a particular topic (instead of piling a lot of topics into one thread).
Will it have dynamic missions? Yes it will.
Will it have wolfpacks, where each sub has a four man crew? Yes it will.
Is there a playable demo?
Yes there is, it is stable and has a lot of features so you can get a feel for the game.
I just finished 2 hours with the devs and Leo_93, manning the different stations. We successfully located an enemy ship, plotted an intercept, and by god--sank it!
Yes, yes, oh yes!
Sinking a ship was never as gratifying as this.
So, this game is a jewel waiting for subsimmers to pick it up. I happily assume the role of evangelist, it' always fun being in the first wave of something new and cool.
Subsim multiplayer
at last. 
Give their game a shot, I think you'll love it.
And
you can support these guys and help them make this game great.