So far we have 4 out of 8 confimed civs for AOE4. A Viking civ would be a cool addition, so here are some suggestions for abilities that would fit a Viking civ.
Vikings were raiders, and what would be a better way to emphasize this than to give them a bonus to raiding enemy towns?
An example could be: “When you destroy a building you get 20% of the recourses used to construct that building. When you kill an enemy unit you gain 5% of the recourses used to train that unit.”
A general bonus against buildigs for their infantry could be nice too.
The Vikings were even more known for their trading, than for their raiding. So a bonus that emphasizes this would be nice.
Something like: “The minimum market trade rate is -100 for +25. The maximum trade rate is -400 for +100.”
3: Sea Kings
Vikings were very known for their sea faring, as well as their sea kings, of which their kingdom was their fleet.
So for this I have 3 suggestions.
Ship Bonus: “All viking ships can traverse land slowly by being pulled on logs.” Something the Vikings was very known for.
Longship: “A quick combat ship, capable of storing units.”
Capital Ship: “A larger ship that doubles as a town center. Must be docked onto shore to function as garther point. Can produce berserkers in later ages. The capitol ship should both provide population space, as well as take some of that population space”
Berserkers were the elite among the Vikings. There are many written records of them, some even describing them being pierced by spears only to walk into the spear, and keep on fighting.
So a quick, high damage infantry unit that keeps fighting for roughly 5 seconds after dropping to 0 HP could be nice.
King Sverre Sigurdsson became well known for his use of heavy cavalry against infantry. Giving them a heavy cavalry with an attack bonus Vs infantry, and a defence bonus against anti cavalry damage could be a nice reference to that.
Vikings did not in any way have a separation between military and civilians. So, in the second or third age they should be given the option to make the Huskarl. A Villager, that is also a capable infantry unit.
Vikings should have horrible siege weapons, but a strong raiding potential. A strong and mobile navy, but bad farming alternatives, perhaps relying more on animals in a similar way to the Mongols.
Their overall eco should rely at least somewhat on raiding, considering this was one of their bigger incomes during the viking period. Trading should also be a focus, meaning their standard recourse production would need to be somewhat weaker.
Vikings should have strong but limited stone defences. They were well known for making sturdy stone fortifications, but rarely utilised this technology, as they more often relied on mobility.
Viking towns should be compact and semi-mobile, with strong but expensive and limited stone defences. With an economical reliance on raiding and trading.
EDIT: I somehow confused the name Snorre Sturlason with Sverre Sigurdsson. It’s fixed now. Embarrassing one on my end.