Here is the full list of all 53 Fate/EXTELLA: The Umbral Star trophies - there are 46 bronze, 3 silver, 3 gold and 1 platinum.
Obtained all trophies.
Defeated a total of 5,000 Aggressors.
Succeeded 100% completion rate in the gallery.
Recorded all Mystic Codes in the gallery.
Cleared all stages on VERY HARD difficulty.
Raised 3 Servants' Bond level to 30.
Raised a Servant's Bond level to 30.
Prevented a Sector Trap 30 times.
Cleared all Servants' sidestories.
Completely cleared Archimedes' sidestory.
Completely cleared Elizabeth Bathory's sidestory.
Completely cleared Gilgamesh's sidestory.
Completely cleared Iskandar's sidestory.
Completely cleared Jeanne D'Arc's sidestory.
Completely cleared Karna's sidestory.
Completely cleared Lu Bu's sidestory.
Completely cleared Medusa's sidestory.
Completely cleared Nameless' sidestory.
Completely cleared Gawain's sidestory.
Completely cleared Li Shuwen's sidestory.
Completely cleared Artoria Pendragon's sidestory.
Completely cleared Cu Chulainn's sidestory.
Cleared Artoria Pendragon's hidden side mission, then defeated her, on four different stages.
Cleared Artoria Pendragon's hidden side mission, then defeated her, once.
Cleared the Golden Poem arc.
Recorded all Install Skills in the gallery.
Allied with Tamamo no Mae in the Golden Poem arc.
Revealed the true name of your Noble Phantasm 20 times.
Defeated a total of 1,000 Aggressors.
Cleared the Dawn arc.
Defeated Nero Claudius in the Orchid Poem arc.
Succeeded 25% completion rate in the gallery.
Defeated Tamamo no Mae in the Dawn arc.
Prevented a Sector Trap for the first time.
Upgraded one Install Skill by +20.
Performed 200 Extella Maneuvers.
Cleared the Orchid Poem arc.
Defeated Altera in the Orchid Poem arc.
Performed 50 Moon Crux/Drives.
Conquered a total of 100 sectors.
Cleared the Flame Poem arc.
Defeated Altera in the Flame Poem arc.
Upgraded one Install Skill by +10.
Defeated Tamamo no Mae in the Flame Poem arc.
Equipped a new Mystic Code.
Obtained an EX rank in the results.
Performed a Moon Crux/Drive for the first time.
Equipped an Install Skill for the first ime.
Cleared the 1st stage of the Flame Poem Arc.
Revealed the true name of your Noble Phantasm for the first time.
Switched with another Servant in battle for the first time.
Performed an Extella Maneuver for the first time.