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