Fishing Boat and Fishing Canoe wood cost -20, train time -30%
10
Sawmills
Villager gather work rate for tree and Mango Grove +15%; land villager changes gather yield for tree and Mango Grove +15%
0
Exotic Hardwoods
Villager gather work rate for tree and Mango Grove +20%
25
Silversmith
Villager gather work rate for mine and Mountain Monastery +20%; land villager changes gather yield for mine and Mountain Monastery +20%
10
Royal Mint
Villager gather work rate for mines, Estate, Rice Paddy (coin), Field (coin), Mountain Monasteries, and Hacienda (coin) +25%; Hacienda auto gather work rate for coin +25%
25
Sustainable Agriculture
Villager gather work rate for Mill, Farm, Rice Paddy (food), Field (food), and Hacienda (food) +15%; Hacienda auto gather work rate for food +15%
10
Furrier
Villager gather work rate for hunted animals +15%, for Berry Bush and Cherry Orchard +20%; land villager changes gather yield for hunted animals +7.5%, for Berry Bush +10%
0
Spice Trade
Villager gather work rate for hunted animals, Berry Bush, and Cherry Orchard +20%; land villager changes gather yield for hunted animals and Berry Bush +10%
Fortress: 1 Falconet, Band of Landsknecht Mercenaries,
Industrial: 1 Mortar and Hire Hessian Jaegers
In the original Age of Empires III, it's not important to earn large amounts of experience in the campaign (cheats), this is due to the fact the player won't be able to Build a Deck like in skirmishes. Any new cards unlocked will not be able to be switched out for inferior cards, so the player is stuck with both. Furthermore, if the player reaches the maximum number of cards allowed in a single age (9) the next card purchased for that age will push one off the list (can never be used again), maybe even one the player wanted to keep. This is no longer the case in Age of Empires III: Definitive Edition, where the player can use the standard deck builder interface.
Trivia[]
A Home City level of 71 is required to unlock all the available cards.
Increasing the Home City level also increases the deck size limit, which can go beyond the number of cards the player can place in the deck (10 per age maximum, so 40)
The '7 Sheep + 1 Homestead Wagon' card as well as several cards in the Military Academy and Harbor have a purple border, but cannot be sent an infinite number of times. Note the missing infinity symbol in the top left typical for cards that can be sent infinitely.