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