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