Here is the full list of all 106 Total War: SHOGUN 2 achievements.
Complete the Battle of Hakodate without any Imperial units being routed. [Fall of the Samurai only]
Win the Battle of Aizu after provoking all four hidden armies at once. [Fall of the Samurai only]
Win the Battle of Ueno without capturing any of the key temple buildings. [Fall of the Samurai only]
Win the Battle of Osaka after both bridges get blown up by the defenders. [Fall of the Samurai only]
Carry out a bombardment with a French ironclad in your navy. [Fall of the Samurai only]
Win a battle with United States Marines in your army. [Fall of the Samurai only]
Chase down and rout an enemy unit as it tries to escape the Battle of Toba-Fushimi. [Fall of the Samurai only]
Sink an enemy ship with torpedoes. [Fall of the Samurai only]
Win a battle with British ships in your navy. [Fall of the Samurai only]
Playing as the Satsuma, construct a trade district and trade with a foreign power within the same campaign. [Fall of the Samurai only]
Create a second avatar for use in avatar conquest mode.
Sink an enemy ship by ramming. [Fall of the Samurai only]
Defeat a Shogun 2 army with a Fall of the Samurai army. [Fall of the Samurai only]
Attain the maximum level of clan development. [Fall of the Samurai only]
Construct a railway between 2 provinces. [Fall of the Samurai only]
As the defender, recapture a tower.
Call in naval fire support during a land battle. [Fall of the Samurai only]
Complete all historical battles. [Fall of the Samurai only]
Win 20 naval battles in multiplayer.
Complete the Battle of Miyako Bay with the Kotetsu having taken less than 25% damage. [Fall of the Samurai only]
Play a historical battle. [Fall of the Samurai only]
Win a multiplayer battle where more than 50% of your army is made up of matchlock units.
Win 200 multiplayer battles of any type.
Through the avatar system, get a veteran unit to level 9.
Win a campaign as the Uesugi clan.
Win a campaign as the Tokugawa clan.
Obtain a maximum level metsuke.
Obtain a maximum level ninja in the campaign.
Win a campaign as the Takeda clan.
Be the first clan in the campaign to master the art of epic architecture.
Your daimyo wins 3 consecutive land battles during the summer season.
Obtain a maximum level missionary.
Win a campaign as the Mori clan.
Win a campaign as the Hojo clan.
Obtain 100 fame within 50 turns.
Sink a nanban trade ship or the flagship vessel the Nihon Maru during a naval battle.
Obtain a maximum level monk.
Win a campaign as the Date clan.
Win a campaign on hard difficulty.
Win a campaign as a Christian daimyo.
Win a campaign as the Shimazu clan.
Obtain a unit of maximum rank in the grand campaign.
Spend the maximum number of points in your avatar's skill tree.
Win a campaign as the Chosokabe clan.
Win a defensive siege battle with the lady of the house, the Onna Bushi, as your general. (Single Player Only)
On maps with more than one key building, your alliance shows its dominance by holding all of them simultaneously.
Win a multiplayer battle using no ranged units in your army.
Obtain a maximum level general in the campaign.
Have all your army, except the general, hidden simultaneously for more than 30 seconds.
Win 100 matchmade battles in multiplayer.
Be the first clan in the campaign to master the art of Shih.
Control all the provinces on the island of Kyushu in the campaign.
Win a multiplayer battle using no cavalry units (excluding the general) in your army.
Control all the trade posts on the campaign map at the same time.
Wipe out the Hattori clan in the campaign.
Be the first clan in the campaign to obtain gunpowder mastery.
Win a campaign as the Oda clan.
Win a campaign on easy difficulty.
Win a campaign on normal difficulty.
Achieve the ultimate goal and become Shogun in the grand campaign.
Wipe out the Ikko-Ikki in the campaign.
Win a battle using an army composed entirely of hero units and your general.
Personally earn 20 clan tokens.
Your clan holds 5 provinces simultaneously on the multiplayer clan campaign map.
Join a multiplayer clan in Shogun 2.
Win 50 matchmade battles in multiplayer.
Win a multiplayer battle using no spear units in your army.
Through the avatar system, get a veteran unit to level 4.
Win 25 matchmade battles in multiplayer.
Capture 15 provinces on the avatar campaign map.
Win a multiplayer battle losing less than 15% of your starting troops.
Play 10 multiplayer battles of any type.
Defeat a Creative Assembly staff member in battle, or anyone else who has gained this achievement.
Win your first multiplayer battle.
Win 25 land battles.
Control all the provinces on the island of Shikoku in the campaign.
Successfully rally 5 units at once with one use of the general's rally ability.
Win a battle using an army composed of at least one of every class of unit (sword infantry, cavalry, archer, matchlock, spear, naginata).
Collect 10,000 heads of enemy soldiers.
Keep at least 4 ashigaru units for a whole battle without routing once.
Completely wipe out an enemy unit.
Capture all provinces on the avatar campaign map.
Win 10 siege battles as the attacker.
Win 10 siege battles as the defender.
Win a multiplayer co-op campaign.
Win a multiplayer head to head campaign.
Win a campaign on very hard difficulty.
Achieve the ultimate accolade and obtain rank 1 on the multiplayer Shogun Ladder.
Win a campaign on legendary difficulty.
Max out any [Fall of the Samurai] avatar skill tree, by spending a skill point in each skill within a single skill tree.
Defeat a Fall of the Samurai army with a Shogun 2 army.
Win a defensive siege battle with your daimyo during any winter turn.
Gift your co-op partner an army or navy.
Playing as the Tosa, carry out 5 naval bombardments in the same campaign. [Fall of the Samurai only]
Playing as the Aizu, carry out 3 successful assassinations of generals in the same campaign using a shinsengumi. [Fall of the Samurai only]
Playing as the Nagaoka, research any eighth tier technology. [Fall of the Samurai only]
Playing as the Jozai, win 3 ambush battles in the same campaign. [Fall of the Samurai only]
Obtain a maximum level agent of each type. [Fall of the Samurai only]
Win a campaign on legendary difficulty playing as either the Satsuma, the Tosa or the Choshu. [Fall of the Samurai only]
Win a campaign on legendary difficulty playing as either the Aizu, the Jozai or the Nagaoka. [Fall of the Samurai only]
Fight a drop-in battle.
Sink an HMS Warrior-class ship. [Fall of the Samurai only]
As the attacker, burn a castle's gates, towers and tenshu to the ground using fire arrows and win the battle.
Win a multiplayer head to head campaign despite giving the other player 10,000 koku.
Playing as the Choshu, incite 3 rebellions in the same campaign using an ishin shishi. [Fall of the Samurai only]
Declare your independence and complete a campaign. [Fall of the Samurai only]