Here is the full list of all 77 Valdis Story: Abyssal City achievements.
On Hard difficulty or higher, defeat Treu with an [S] rank.
On Hard difficulty or higher, defeat Lozzo with an [S] rank.
On Hard difficulty or higher, defeat Ragano with an [S] rank.
On Hard difficulty or higher, defeat The Raven with an [S] rank.
Summon the Raven to the Central Skyways.
On Hard difficulty or higher, defeat Possessed Dhistahn with an [S] rank.
On God Slayer difficulty or higher, defeat Abomination with an [S] rank.
On Hard difficulty or higher, defeat Magus with an [S] rank.
On Hard difficulty or higher, defeat Jahzracht with an [S] rank.
On Hard difficulty or higher, defeat Dhistahn with an [S] rank.
On Hard difficulty or higher, defeat Abbigail with an [S] rank.
Hire Brizhal the mercenary.
On Hard difficulty or higher, defeat The Yeti with an [S] rank.
On Hard difficulty or higher, defeat Shu Gohth with an [S] rank.
On Hard difficulty or higher, defeat Ruckjahl with an [S] rank.
On Hard difficulty or higher, defeat Tagu with an [S] rank.
Defeat any boss without getting hit.
On Hard difficulty or higher, defeat Azudor in Tagrum with an [S] rank.
Deal 500+ damage in a single hit.
Deal 1000+ damage in a single hit.
Deal 125+ damage in a single hit.
Deal 250+ damage in a single hit.
Spend 20 stat points in Agility.
Spend 20 stat points in Intelligence.
Spend 20 stat points in Strength.
Spend 20 stat points in Luck.
Perform a 20 hit combo.
Defeat any boss with less than 5% Hp remaining, and without using potions.
Perform a 10 hit combo.
Perform a 35 hit combo.
Perform a 50 hit combo.
On Hard difficulty or higher, defeat Soul Rage Azudor with an [S] rank.
On Hard difficulty or higher, defeat Gernot with an [S] rank.
On Hard difficulty or higher, defeat The Eye of Myrgato with an [S] rank.
On Hard difficulty or higher, defeat The Eye of Alagath with an [S] rank.
On Hard difficulty or higher, defeat Anemone with an [S] rank.
Beat the game as Wyatt.
Beat the game as Reina.
Beat the game as Wyatt on God Slayer difficulty.
Beat the game as Reina on God Slayer difficulty.
Beat the game with 100% map completion.
Beat the game with 100% items found.
Beat the game with 100% civilians saved.
Beat the game with 100% crew found.
Beat the game with an Adventurer Rank of [S].
Beat the game with a Combat Rank of [S].
Beat the game with an Adventurer and Combat Rank of [S].
On Hard difficulty or higher, beat the game with an Adventurer Rank of [S].
On Hard difficulty or higher, beat the game with a Combat Rank of [S].
On Hard difficulty or higher, beat the game with an Adventurer and Combat Rank of [S].
On Veteran difficulty or higher, beat the game with an Adventurer Rank of [S].
On Veteran difficulty or higher, beat the game with a Combat Rank of [S].
On Veteran difficulty or higher, beat the game with an Adventurer and Combat Rank of [S].
On God Slayer difficulty or higher, beat the game with an Adventurer Rank of [S].
On God Slayer difficulty or higher, beat the game with a Combat Rank of [S].
On God Slayer difficulty or higher, beat the game with an Adventurer and Combat Rank of [S].
Retry 40 times.
Read All 5 Books of the Old Gods.
Beat the game without saving on Hard difficulty or higher.
Beat the game without changing or upgrading your weapon, armor, or accessory.
Perform a God Slayer ranked combo.
Beat the game on Goibniu Mode.
On Hard difficulty or higher, beat the game in less than 3 hours.
Perform a Stigandr ranked combo.
Defeat any boss by using a Focus Finisher.
On Hard difficulty or higher, defeat The Feral Manawar with an [S] rank.
On Hard difficulty or higher, defeat True Anemone with an [S] rank.
Beat the game as Vladyn.
Beat the game as Vladyn on God Slayer difficulty.
Beat the game as Gilda.
Beat the game as Gilda on God Slayer difficulty.
Perform a 100 hit combo.
Beat the game without using elixirs.
On God Slayer difficulty or higher, defeat Leilodin with an [S] rank.
Unlock every weapon on all four characters.
Learn all focus finishers in a single play through.
Reach the 30th floor of the Heaven or Hell Arena