Moriboe: I`m a Norwegian and aren`t new to this
I`ve off course checked the pre-techs and had both theology & steel in every attempt but still no berserkers
Due to written (British) history the Vikings "appeared" at Lindisfarne, but they`ve been trading & fighting for centuries before that. Archeology shows viking-settlements as old as 4-5000 years, and surprisingly cultivated for that period.
The socalled Berserkers were professional Norse warriors, known for using drugs or dop to get "in the mood". Dop here includes their religion.
To understand the vikings you`ll need to know their warrior-culture; every little boys dream back then was to became a good enough warrior to be picked for one of the kings longships,to make himself a name. Much like a boys dream to be a football-pro today.
Every boy would practise with toy-weapons from early days, and a some would be picked by local chiefs to join their troups to test them out in battle and see if they could be trusted. Before beeing considerated even on a smaller/local kings ship every man had to be tested for courage, no weakness was accepted.
Then some of those who made themself a name might be offered a place in one of the kings longship.
They were not just armed with spears or axes but a tactical mix of bows, spears, axes & swords.* No need to tell they all had great weapon-skills, what most does`t know is that they allso was known for their skills without weapons, with bare hands.
Not only did the East-Roman empirer choose them as lifeguards, they also were used as instructors in bare-hand battle for his royal guard since they were known as the best in that too.
It`s not too easy trying to make all this right in the game, some compromises has to be done. Yours are not the worst I`ve seen
*
http://warviking.tripod.com/realweaponsandarmor.html
http://forums.civfanatics.com/showthread.php?p=10460968#post10460968