Here is the full list of all 88 Nioh 2 – The Complete Edition achievements. It takes around 100-120 hours to unlock all of the achievements on Windows.
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Completed picture scroll missions 10 times.
Acquired mystic art for the tonfa.
Acquired mystic art for the odachi.
Completed "Against All Comers" on Dream of the Demon or higher.
Acquired mystic art for the splitstaff.
Acquired mystic art for the kusarigama.
Acquired mystic art for the switchglaive.
Acquired mystic art for the axe.
Bathed in every hot spring found in "The Tengu's Disciple".
Acquired mystic art for the hatchets.
Lit all fire altars in "Palace of the Damned".
Caused Oboroguruma to release Amrita from its carriage at least 10 times.
Defeated Tsuchigumo while equipped with at least one piece of gear with the special effect "Dragon Ninja".
Used the Brute, Feral, and Phantom Burst Counters five times each to counter a Burst Attack.
Acquired mystic art for the spear.
Rang all the bells in "Ruin Draws Near".
Encountered all the Usura-Hicho in "The Frenzied Blaze".
Became Ryunojo the Dung Lover's best friend and received the Coiled Snake Helmet smithing text.
Collected all Kodama in "The First Samurai".
Remodeled a piece of equipment.
Bathed in every hot spring.
Got Gyuki to attack the dam in "Pervading Waters".
Acquired mystic art for the sword.
Obtained the aid of Tokichiro, Minamoto no Yoshitsune, and Minamoto no Yorimitsu from a Benevolent Grave in "A Familiar Glow".
Completed "The Alluring Ancient".
Attained 100% Penitence on a Stone of Penance.
Defeated Gozuki in "The Village of Cursed Blossoms".
Appraised your tea utensils 50 times.
Completed "A Distant Dream".
Saved all the Mujina in "A Distant Dream".
Defeated the four demons in "A Distant Dream".
Bathed in every hot spring found in "The First Samurai".
Collected all of Kukai's brushes in "Words of Respite".
Completed "Dawn of the Demon".
Used a cask of holy water in "Dawn of the Demon" to damage an enemy's Ki.
Acquired mystic art for Ninjutsu.
Completed "The Dragon's Kin".
Completed "Palace of the Damned".
Collected all Kodama in "Darkness in the Capital".
Bathed in every hot spring found in "Darkness in the Capital".
Completed "The Blighted Gate".
Completed "Suzune in the Flames".
Completed "Eternal Rivals".
Used an attack to knock Yoshitsune off his perch on the bridge in "Eternal Rivals".
Collected all Kodama in "The Tengu's Disciple".
Collected all of Saigyo's poetry cards.
Destroyed 150 of the golden Amrita shards found in the gold mine in "Eternal Rivals".
Acquired mystic art for Onmyo Magic.
Completed "Shadows Creep in Kurama".
Completed "A Song to Calm the Storm".
Used all the giant bows in "A Song to Calm the Storm".
Obtained all Soul Cores.
Saw Tokichiro off on his final departure.
Defeated all types of yokai.
Dispelled every instance of the Dark Realm in the main missions.
Collected all Guardian Spirits.
Fulfilled your ultimate destiny.
Defeated each of the Seven Spears in "Cherry Blossom Viewing in Daigo".
Collected all Kodama.
Acquired mystic art for the dual swords.
Reached level 100.
Reunited with your mother in the Interim.
Destroyed every Amrita shard in "The High-spirited Demon".
Defeated Tokichiro.
Acquired mystic art for the fists.
Parted ways with Tokichiro.
Discovered 10 hidden items on the map.
Fused any Soul Core until it reached rank 9.
Performed a Soul Match.
Displayed a calligraphy scroll in your hut.
Drove back every Tatarimokke along the journey in "A Way Out".
Decided to share a name with Tokichiro.
Completed 10 missions with NPCs or as Expeditions with other users. (Does not include Acolytes.)
Defeated Imagawa Yoshimoto and was made a samurai.
Completed your first Twilight mission.
Defeated Mezuki and Gozuki in the same mission.
Obtained a Kodama's Soul Core.
Defeated the boss of "The Viper's Sanctum" without breaking the statue of Shirohami.
Summoned an Acolyte from a Benevolent Grave 10 times.
Listened to the innermost thoughts of a Yokai Weapon.
Forged an item.
Bathed in first hot spring.
Exchanged gifts with a Sudama for the first time.
Reached level 10.
Befriended Tokichiro.
Used the Kodama Bazaar.
Obtained your first Soul Core.