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