Below is a list of all the collectibles in the base game of Dark Alliance as well as the level in which they can be found. I am the Community Manager for Dark Alliance and this list comes directly from Tuque Games.

If you collected all collectibles before the August 2, 2021 game update, you will need to create a brand new character and pick up a collectible for the achievement to pop (the one at the Base Camp works).

There are five types of collectibles found in the game, for 122 total collectibles:
70 Tablets
38 Tomes
6 Paintings
8 Reliefs

Each section of collectibles is broken down by group, while in the Base Camp open your character sheet and use the "sort" function on the collectibles screen to see each group and compare with this list to determine which ones you are missing. Collecting all of them will unlock the "Now It Makes Sense" achievement.

The Rise of Clan Battlehammer (10)
The Arrival of the Dwarves (Goblins – Act 1)
Settlement of Cindryc’s Rift (Goblins – Act 2)
The Dwarven Forge (Verbeeg – Act 1)
Expulsion of the Verbeeg (Verbeeg – Act 2)
Coronation of the King (Verbeeg – Act 3)
Conflict with the Frost Giants (Companions – Act 1)
Construction of Bangor’s Span (Companions – Act 2)
The Mining of Kelvin’s Cairn (Companions – Act 3)
The Long Winter (Crystalline Dreams – Act 2)
The Goblin Raid of Termalaine (Kelvin – Act 1)

The Rise and Fall of Kelvin the Great (7)
Kelvin’s Marriage and Seat of Power (Kelvin – Act 3)
The Statue of Annam (Kelvin – Act 2)
The Hall of Judgement (Kelvin – Act 1)
Kelvin and the Crystal Shard (Crystalline Dreams – Act 3)
Kelvin’s Alliance (Crystalline Dreams – Act 2)
Temple of the Everspring Tree (Crystalline Dreams – Act 1)
The Tomb of Kelvin (Icewind – Act 2)

The Fate of the Netherese (9)
Mysteries of the Netherese (Order of the One Light – Act 3)
Settlement of Netherhall (Goblins – Act 1)
The Netherese Testaments (Goblins – Act 3)
Dead Netherese (Verbeeg – Act 1)
A Sudden Turnaround (Companions – Act 3)
Betrayal in Netherhall (Icewind – Act 1)
The Sudden Disappearance (Crystalline Dreams – Act 1)
The Sea of Moving Ice (Crystalline Dreams – Act 2)
Scattered Ruins (Kelvin – Act 3)

Ostoria, Kingdom of the Jotun (9)
Annam the All-Father (Kelvin – Act 3)
The Wonders of Ostoria (Order of the One Light – Act 2)
A Rain of Stars (Goblins – Act 1)
The Thousand Years War (Goblins – Act 2)
Vonindod (Verbeeg – Act 1)
The Deeds and Death of Hjurnur Dragonslayer (Verbeeg – Act 3)
Othea’s Offspring (Companions - Act 3)
The Fall of Ostoria and the Dark Age of the Jotun (Icewind – Act 2)
The Mask of Kelvin (Crystalline Dreams – Act 2)

The Life of Verbeeg (10)
Birth of the Verbeeg (Companions – Act 2)
A Simple Life, A Cunning Mind (Icewind – Act 1)
A Life in the Cold (Kelvin – Act 2)
Allies of Kelvin (Kelvin – Act 3)
Their Association with Goblins (Order of the One Light – Act 1)
Degenerations and Obsessions (Goblins – Act 1)
Their Hill Giant Differentiators (Goblins – Act 3)
Tactics of the Verbeeg (Verbeeg – Act 1)
Dominated by Kessell (Verbeeg – Act 2)
Allegiance with Utaar (Companions – Act 1)

The Geography of Icewind Dale (8)
Kelvin’s Cairn (Icewind – Act 1)
The Spine of the World (Crystalline Dreams – Act 1)
The Lakes (Kelvin – Act 1)
The Wounded Mountain (Kelvin – Act 3)
The Rivers (Order of the One Light – Act 1)
The Hazards of Icewind Dale (Goblins – Act 1)
The Sea of Moving Ice (Verbeeg – Act 1)
The Reghed Glacier (Companions – Act 1)

History of the Smallfolk of Icewind Dale (9)
Good Mead (Goblins – Act 2)
Knuckle Head Trout (Goblins – Act 3)
Termalaine Mine (Verbeeg – Act 2)
Rendaril’s Emporium (Verbeeg – Act 3)
The Long Winter (Companions – Act 1)
Raiders and Caravans (Companions – Act 2)
The Rise of Kessell (Crystalline Dreams – Act 1)
The Destruction of Targos (Kelvin – Act 2)
Resettlement of Caer Konig by Reghed Tribes (Order of the One Light – Act 3)

The Tale of the Crystal Shard (8)
Mysterious Origin (Kelvin – Act 3)
Kelvin’s Defeat and the Loss of the Shard (Order of the One Light – Act 2)
Theories of Orc Raids Driven by the Shard (Order of the One Light – Act 3)
The Shard’s Voice (Goblins – Act 3)
Discovery by Kessell (Verbeeg – Act 2)
Destruction of the Towers (Crystalline Dreams – Act 1)
Crystal Remnant (Kelvin – Act 1)
Goal of the Shard (Kelvin – Act 2)

The Crenshinibononomicon (6)
The Seven Masters (Companions – Act 1)
The Power of Light (Crystalline Dreams – Act 3)
The One Vessel (Kelvin – Act 1)
Kelvin the Great (Order of the One Light – Act 1)
Confluence of Seven Worlds (Order of the One Light – Act 2)
Purity of Ambition (Order of the One Light – Act 3)

Journal of Goffin Ironmane (8)
Scouting the Valley (Crystalline Dreams – Act 2)
Trials of Goblins, Orcs, Giants, Yeti and Crag Cats (Goblins – Act 2)
Battle with the Orc King and Bruenor’s Coronation (Goblins – Act 3)
Battle with a Frost Giant King (Verbeeg – Act 2)
Discovery of Chardalyn (Verbeeg – Act 3)
Abandoning Kelvin’s Cairn (Companions – Act 1)
Defeat of the Goblins and the Adoption of Catti-brie (Companions – Act 2)
Lament for Mithral Hall (Companions – Act 3)

The Last Regrets of Tarajhaba (7)
The Search for Ythryn (Kelvin – Act 1)
The Ruin of Netherese (Kelvin – Act 2)
A Desperate Bargain (Order of the One Light – Act 2)
The Return of Magic (Order of the One Light – Act 3)
The Founding of New Netheril (Icewind – Act 1)
The Flourishing of New Netheril (Icewind – Act 2)
Questions of Our Installations and Our Patron (Icewind – Act 3)

Duergar Campaign for the Shard and Icewind Dale (7)
The Call (Crystalline Dreams – Act 1)
The Journey (Crystalline Dreams – Act 2)
Flight of the Battlehammers (Crystalline Dreams – Act 3)
Dominated by Hagedorn (Order of the One Light – Act 2)
The Dwarven Forge (Verbeeg – Act 2)
Thoughts on Cultists (Verbeeg – Act 3)
We are Forsaken (Companions – Act 2)

The Personal Accounting of Raddix Rotax (3)
Tribe of the Goat (Crystalline Dreams – Act 2)
Cultist Machinations (Order of the One Light – Act 1)
The Value of a Goblin Soul (Companions – Act 3)

Notes from Regis (7)
A Missed Visit (Basecamp)
A Celebration in my Honor (Verbeeg – Act 1)
Feasted by the Reghed (Companions – Act 1)
Targos Reconstruction (Companions – Act 2)
Dwarven Housing (Icewind – Act 1)
Nothing to do (Order of the One Light – Act 1)
Where are you? (Goblins – Act 1)

The Trials of Tempus (3)
Endurance of the Elk (Icewind – Act 1)
Courage of the Tiger (Icewind – Act 2)
Will of the Foehammer (Order of the One Light – Act 1)

The Great Chiefs of the Reghed Tribes (2)
Joeraan, King of the Tiger (Icewind – Act 1)
Nagaan, Queen of the Bear (Icewind – Act 2)

The Fall of Haefstaag, King of the Elk (1)
Wulfgar, Dragonslayer (Verbeeg – Act 1)

Kelvin’s Defeat of Araxabrax (3)
The Burning of Valtaeros (Companions – Act 3)
Kelvin Face Araxabrax (Kelvin – Act 3)
Kelvin Defeates Araxabrax (Icewind – Act 3)

Kelvin’s Traps (1)
Kelvin Traps a Bronze (Icewind – Act 2)

Kelvin Bests Black and White (3)
Kelvin Defends his Cities (Crystalline Dreams – Act 1)
Kelvin Surrounded (Kelvin – Act 2)
Kelvin Rides the Dragons (Goblins – Act 3)

Kelvin’s Triumph (1)
Kelvin Triumphs Over Dragons (Order of the One Light – Act 2)