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