Here is the full list of all 50 Saint Seiya: Soldiers' Soul achievements.
Used Deathmask (Surplice) to defeat Mu after being hit by his Crystal Wall!
Used Kaasa to defeat Seiya, Shun, Hyoga and Ikki!
Completed the Legend Survival Class!
Completed the Gold Survival Class!
Performed 50 Cosmic K.O.s!
Used Poseidon (Tuxedo) to defeat Athena 3 times!
Used Jabu to clear Survival! (Any class)
Used Ichi to clear Survival! (Any class)
Unlocked all of the Silver Saints!
Lost a battle without landing a single attack!
Cleared all chapters in Legend of Cosmo to 100%!
Cleared the Hades arc in Legend of Cosmo!
Obtained 100% of possible "S" clear ranks in Legend of Cosmo!
Unlocked Poseidon, Thanatos, Hypnos, Athena and Hades!
Unlocked all of the Marinas!
Unlocked all of the Specters!
Completed the Silver Survival Class!
Cleared the Poseidon arc in Legend of Cosmo!
Cleared 50% of the challenges in Legend of Cosmo!
Hit with a total of 30 Big Bang Attacks!
Cleared the Asgard arc in Legend of Cosmo!
Unlocked all of the God Warriors!
Acquired a total of 100,000 CP!
Cleared the Sanctuary arc in Legend of Cosmo!
Experienced the Tutorial!
Completed the Bronze Survival Class!
Cleared your first challenge!
All God Cloth Gold Saints have all been unlocked!
Obtained first "S" clear rank! (Any mode)
Acquired all Trophies!
Unlocked all of the Bronze Saints!
Unlocked all of the Gold Saints!
All God Cloth Bronze Saints have all been unlocked!
Completed the God Survival Class!
Completed the Big Bang Survival Class!
Completed the Galaxy War Bronze Cup!
Completed the Galaxy War Silver Cup!
Completed the Galaxy War Gold Cup!
Completed the Galaxy War Legend Cup!
Completed the Galaxy War God Cup!
Collected 100% of Big Bang Attack movies in the collection!
Completed the collection!
Collected 80% of titles!
Collected 50% of Assist Phrases!
Collected 100% of Assist Phrases!
Maxed out Assist Phrase slots!
Used Alberich to defeat all of the God Warriors!
Used Siegfried to defeat all of the Marinas!
Used Mu to defeat Deathmask (Dark Cloth) and Aphrodite (Dark Cloth) 3times each!
Used Rhadamanthys to defeat Orphee, Sorento and Mime 3 times each!