Here is the full list of all 50 Commander: Conquest of the Americas achievements.
50 attacks from Indians
Player has a colony in every colony spot
Player has a total of 30 tradeships, atleast 3 traderoutes with 5 stops
Defeat 3 enemy nations
Establish at least 3 colonies in area 1
Player got over 100 ships
Control 50 warships at the same time during a normal campaign
Get 10 million in the bank
1000 Trips to home port
Discovered 20 empty colony spots in one game
Conquer a total of 10 colonies
Reached 25 000 soldiers on ships and in garrisons
Palace level 3 built
Sink 20 pirate ships
Player has more than 100,000 colonists
Win 20 tactical battles without losing one ship
Colonies in every territory
Sank 40 enemy ships in a single game
Palace level 2 built
Played 10 tactical battles with "Sunset" as the time of day all during one campaign
1000 units of cigars imported
1000 units of rum imported
Get 1 Million in the bank
1000 tons of gold to home port
Won a battle without taking any damage on any ship
Fought the 1st naval battle
3 different product factories in one city
100 Trips to home port
Palace level 1 built
1000 units of resources gotten from Indians
20 years without fighting
Player concluded the 1st diplomatic negotiations
Passed the 1st 5 years in the game
Sold 1st cargo
Established 1st colony
100% colony morale achieved
Successfully capture 10 ships with boarding action
10000 Trips to home port
1000 tons sugar to home port
Allies with all other nations
At war with all nations at once
Built every single ship in game
Hit one enemy ship, range 2000 or more
Built one of every tradeship type in a single game
Built one of every warship type in a single game
Declare war 20 times
10 colonies founded in a single game
Completed the Getting Started Tutorial
Player has 5/4/3 colonies in area 4 (easy/normal/hard)
Visit 5 ports with at least 200 colonists onboard from your homeport and then return home.