Codex & Monster Database Guide
Echoes of Aincrad tracks you through five automatic databases — World, Item, Equipment, Monster and Character. The Monster Database is the one that stalls at 80%: the kill has to land, elite variants count separately, and a chunk of enemies only exist in specific weather, at night, or behind an Ark. This guide is the fill-it-all checklist, with the other four registries as quick reference.
Every database writes its entry at a different moment — entering, holding, owning, killing or speaking. Knowing which action commits the record is the whole trick.
The Codex Is Real — Five Registries
There is no single "codex menu" to maintain. Instead the game quietly keeps five registries that fill themselves as you play, and they gate six trophies. The World Database is the biggest at 177 entries; the Monster Database is the one most people leave unfinished.
The full system breakdown — how each registry registers entries, where the 177 World entries hide, and the Key Stone set — lives in the Databases & Collection guide. This page focuses on the how-to: the practical order and the traps that cost you entries.
Monster Database: The Long Pole
The rule is one line: defeat every enemy type once, including bosses and elite variants. The kill is what writes the record — fleeing an encounter registers nothing, and an elite is a separate record from its base form. What makes this database slow is that a fair share of enemies do not exist for you until a condition is met.
| Easily Missed Type | Why It Slips Past You | How To Catch It |
|---|---|---|
| Weather-gated spawns | Some enemies only appear in a specific weather condition, so they vanish if you fast-travel through a zone in clear skies. | Fast-travel repeatedly or rest until the right weather rolls in, then sweep the zone's usual spawn points. |
| Night-only spawns | The day-night cycle hides a share of enemies, and most players only explore at day. | Rest or wait until night, then walk the same field routes you already cleared. Night spawns are often right next to day spawns. |
| Ark-gated enemies | Clearing an Ark's guardian is what drops the Sealing Barrier and opens the connected zone — skip the Ark and the enemy behind it never exists for you. | Treat every Ark as a map unlock. The barrier system is covered in the Arks & Sealing Barriers guide. |
| Quest-locked encounters | A few records only appear inside a specific main or side quest instance. The Shrewman line, for example, is tied to the Within the Shadows main quest. | Replay or revisit the quest from the mission menu after clearing the story — instances stay available for cleanup. |
| Elite variants | Most base enemies have an elite sibling with a different name, more health and an added ailment. Players skip them as a 'harder copy' when the database counts them separately. | Kill each named variant once — Filthy Wasp for the Wind Wasp, Scarred and Mama Boar for the Frenzy Boar, Raging Mountain Bao in the southern savanna. They also drop the best early weapon tables. |
Which enemies exist and where — including the elite variants with their upgraded drop tables — is laid out in the enemies & elite variants guide. Weather and night spawns are the ones that hide in plain sight: the same field route you cleared at noon can hold an entirely different enemy list after sunset.
Quick Checklists for the Other Four
None of these need a grind — each registry has a single trigger and a cheap way to clear it. The principle everywhere is register as you go; the cleanup run costs hours.
World Database
Enter the area177 entries across both floors. Walk across the boundary of a field, town district or dungeon interior and it registers — no menu step. Shortcuts hide the most entries.
Open related guideItem Database
Hold the item onceConsumables, materials and key objects write their record the moment they enter your inventory. Buying one of everything at the Item Seller clears most of it without farming.
Open related guideEquipment Database
Own the piece onceWeapons and armour register on ownership, not use. Forging blueprints at the Smithy for weapon classes you never play is the cheapest way to fill Walking Armory.
Open related guideCharacter Database
Speak to the NPCTalking to a named shopkeeper, innkeeper or quest giver once registers them. Partners register on recruitment and several story characters register during cutscenes.
Open related guideWhich Trophies This Feeds
Six of the game's 52 achievements sit on the databases. Monstrous Knowledge is the one most players hit last, and it is the reason the Monster Database section above exists.
| Trophy | Value | Database | How To Clear It |
|---|---|---|---|
| Monstrous Knowledge | 10G | Monster | Kill a variety of enemy types, including elite variants. This is the trophy that stalls most often because players skip weather, night and Ark-gated spawns. |
| Association Archivist | 10G | World | 10 World Database entries — clears itself inside the first hour. |
| Aincrad Professor | 40G | World | The 40G heavyweight behind the 177-entry total. Full map coverage on both floors. |
| Pack Rat | 10G | Item | Buy one of every consumable at the Item Seller instead of farming drops. |
| Walking Armory | 10G | Equipment | Craft blueprints you have no intention of using — ownership registers the entry. |
| Walking Dictionary | 10G | Character | Do a talk-to-everyone lap of each new town on arrival. |
The full 52-trophy list including the 14 secret story unlocks is in the achievements and trophies guide.
Six Ways the Monster Database Stalls
None of these warn you in-game. The registry fills silently, so a bad habit only surfaces when you open the menu after the credits and see a number stuck below the total.
- ◆Assuming encounter = entry. Seeing an enemy and fighting it feel the same in the moment — Only the kill writes the record. Fleeing or letting a partner finish a foe while you watch does not register it.
- ◆Clearing zones only at day. Day is the default and the map looks fully explored — Return at night and in different weather. The records are tied to the spawn condition, not the location.
- ◆Skipping Ark guardians. Arks look like optional endgame content — They gate terrain and the enemies living in it. Clearing one unlocks both a World entry and usually a Monster entry.
- ◆Writing off elites as reskins. Same body, familiar moveset — Different name means a different record and a better drop table. Check the enemies guide for which variants exist.
- ◆Saving all completion for post-game. The world stays open after the credits — True, but a cleanup run costs hours. Registering as you go costs minutes per zone.
- ◆Forgetting bosses count. Boss guides list them as separate encounters — Every boss is a Monster Database entry too. Beating the story already covers these — only optional bosses need a separate visit.
Start With the Kill, Finish With the Map
The Monster Database is combat, the World Database is exploration, and the other three are habits. Clear all five and the database trophies fall with them.
Frequently Asked Questions
Does Echoes of Aincrad have a codex?
Yes — five automatic registries: World, Item, Equipment, Monster and Character. Areas register on entry, items on pickup, gear on ownership, enemies on defeat, and NPCs on conversation. No manual menu submission exists.
How do you fill the Monster Database?
Defeat every enemy type once, including bosses and elite variants. Elites count separately — killing the Wind Wasp does not register the Filthy Wasp. Some enemies only spawn in specific weather, at night, inside an Ark-gated zone, or inside a particular quest.
Why am I missing Monster Database entries?
Weather-gated and night-only spawns, enemies sealed behind Ark guardians, quest-locked encounters like the Shrewman line, and elite variants skipped as reskins. All can be mopped up post-game since the world stays open.
Do elite variants count separately?
Yes. Filthy Wasp, Scarred and Mama Boar, Raging Mountain Bao and the elite Kobold are separate records with better drop tables — several are among the best early weapon sources in the game.
Does codex completion affect achievements?
Yes. Six trophies sit on the databases, including Monstrous Knowledge (Monster) and the 40G Aincrad Professor (World). Prismatic Powerhouse extends the theme into the post-game Key Stone set.
Are any codex entries permanently missable?
No. The map stays open after the credits and quest instances can be revisited, so every entry is collectable in the post-game. Deferring completion costs time, not access.