I believe the game has 30 Side Quests plus just a few extra things you do from either boredom or heroism..etc! The only thing I haven't finished is beating Eva and the Cinders Quest.. o.O
Finding Meenoba's Rose in the Tangar Mountains
Retrieving Leanda's Orb
Killing Gudar's Ghost in Gudar's Manor
Murdering Dorado the Minotaur Warlord
Getting rid of the Necromancer in the Balthus Cave and rescuing Lisa
Finding every people in the Balthus Cave
Rescuing Wendala and bringing her back to Charly
Beating the Champion at the Arm-Wrestling contest
Bringing Lise's packages in the Tangar Mountains
Getting all Baretta's items
Finding the bad cat in Tangar
Finding Almon the Freeze Mage and bringing him to the Flame in the Granit Tower
Defeating the Wizard Randhaart in the Granit Tower and freeing Tangarians from their curse
Helping Carin by retrieving her Gem from the Pit of Fire
Getting rid of all rats in the old man's warehouse
Solving the Riddle of Aleksandr Vankov in his shrine
Helping Clara Gyurens save her fiance
Murdering Dobuhl Ag
Murdering the tyrannic Minotaur Warlord Orfuls and avoiding the plans of war
Finding and killing the Gargaryan Beast
Getting rid of Raynald Athors' Dark Organization
Recruiting the Gem dealer
Finding Batabog
Killing all 8 Lords of the Evil Tower
Restoring all 13 Cinders of Heroes
Winning the Blazers' Tournament by all 8 characters and getting the secret reward
Killing the Guardians of Dark Souls
Exploring the 3 Lone Sisters Islands
Beating more than 10,000 parties to overcome the Metrolian guy
Now for collecting Artifacts and Relics... I believe it is just for fun/ having the right to say "I did everything in the game possible!" Though many of the relics/artifacts are useful.
Barillk Talisman
Antic Sword
Dahlos De Loo Sword
Gudar Sword
Magnus Fists
Aygaryan Rapier
Lady Mariah Bracelet
Gudar Spear
Lady Diane 1st Bow
Gurkl Helmet
Medusa Shield
Ogulmb Shield
Vankov Sceptre
Orful Warlord Axe
Orful Fur Cape
Battog Assault Mace
Lisbeth Ring
Admira Crown
Empyrion
Azur Constellation
+Artifact+
Grokrl's Amulet
Tamara Ring
Nenuphar Ring
A-maze-ing Rapier
Ajax Ring
Barandos Damuhl
Clash Cutlass
Minotaur Antic Claws
Metallist
Helmet Of the Lycose
Golden Bow
Tantalus Krisser
skull staff
Galleon
Titanix
Firebeath Fists
Rerurren Multi Bow
Sword Of Scrolls
Cocatrix Pendant
Glass Rod Of Aron
Red Apricot Tree
Making your way to Sankt Leona is the "Main" thing you do in this version! But mainly during the game in your Quest Book it will say going to the Sankt Leona Tournament and signing up and such..