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