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