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