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