Hi there
Its difficult to tell hoy many hours of gameplay are possible, some users have 300+ hours in the alpha game, but to be honest, these are fanatics.
At the moment there should be quests for like 1-4 hours of gameplay, compared of how you play this game. But remember, its an early alpha, and sadly there are some bugs with some quests by now if they are played in a specific order.
But there will be a new update very soon which will expand gameplay. We do not know content of new update yet.
Armour/arms tree is very limited by now. There are a couple of different armours, but most of them is used by enemy troops. So if you kill the two men, you will have the armour, but you will not need it anymore.
Besides of the enemy cuman armour, there are three different kinds of armour. Gambeson, brigandine and full plate armour in the game. Gambeson can be combined with the other armours as well as mail armour from your enemies.
Arms is much more limited by now, only two handed sword and a longbow.
You can buy the longbow, but you have to win armour and a sword in arena training fight, or you have to kill enemy troops with nothing but a bow. Maybe this will change with new update, but we don´t know by now.
The world by now… hmm… difficult, two villages and an army camp with some sort of surroundings. Maybe around 5-10% of the final map. The final map will be about 16km².
Sorry, hunting is not part of the alpha gameplay yet.
Updates are here every 2-3 month, the next one should be here very soon.
And don´t be shy to ask whatever you want, you are welcome.