Here is the full list of all 32 Nyasha Valkyrie achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Sigrdrifa Normal
Hjörþrimul Hight
Hildr Hight
Skuld Hight
Hlökk Hight
Herfjötur Hight
Róta Hight
Skögul Hight
Randgríðr Hight
Sigrdrifa Hight
Geirahöð Hight
Hjörþrimul Normal
Hildr Normal
Skuld Normal
Hlökk Normal
Herfjötur Normal
Róta Normal
Skögul Normal
Randgríðr Normal
Geirahöð Normal
Hjörþrimul Easy
Hildr Easy
Skuld Easy
Hlökk Easy
GameOut
Herfjötur Easy
Róta Easy
Skögul Easy
Randgríðr Easy
Sigrdrifa Easy
Geirahöð Easy
GameOn