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