The Vikings were best known for being advent sailors and for establishing colonies in the North Atlantic in Greenland and Canada before the European explorers. They were also known for bringing fear among several European communities since they would raid small villages unexpectedly. As a result, their navy and infantry are among the finest in the game and are one of the few civilizations to have more than one unique unit. The Vikings did not actually wear spiked or horned helmets, but they refrained from trimming their head and facial hair to give the look of a big, scary, and hairy beast. This is reflected by their unique unit, the Berserker, and their unique technology that would benefit them. The Berserk is a warrior equipped with an axe, produced at a Castle that regenerates its health over time. They are a fast infantry unit strong against other infantry and light cavalry, and to an extent against buildings. Their health regeneration rate can be boosted with the technology Berserkergang. In addition, their infantry units receive a 10% Hit Point bonus in the Feudal Age, which increases to a 15% Hit Point bonus in the Castle Age and then to a 20% Hit Point bonus in the Imperial Age. The Vikings also excel at naval warfare and tactics, and even mastered the art of various types of sailing. To reflect this achievement, their Dock-based unique unit is the Longboat which is a type of swift warship that shoots volleys of arrows similar to the Chu Ko Nu. The Viking Longboat was a well-constructed slim boat that gracefully shot through the water. To reflect their ability as fine shipbuilders, all Viking ships cost 20% fewer resources, and their team bonus allows docks to be built for 25% less wood. The Vikings can produce all ships except for the Fire Ship and Fast Fire Ship. They lack most gunpowder units, and cannot produce any camel units. Overall, their cavalry units are weak, but they can produce strong archery units such as the Arbalest. They have weak tower defenses and can only upgrade Watch Towers to Guard Towers, faring better than their neighbors, the Goths and Huns. They are missing a number of upgrades at the Monastery making their Monks weaker than most civilizations. The Vikings also have a strong economy. The Wheelbarrow and Hand Cart are free once advancing to the Feudal and Castle Ages respectively. They can research all economic technologies except for Stone Shaft Mining and Guilds.