Terra Archive is a non-commercial fan toolkit for Arknights players (Doctors). From researching operators to planning your base, recruitment, material farming, upgrade budgeting, and catching up on the story — it parses the game data directly and an automated pipeline keeps everything up to date. No install, no login; it runs right in the browser, and the universal search in the header (⌘K) jumps to any operator, material, story, or tool from a single word.
Seven tools in one. Tap a card to jump to that feature.
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Base Auto-Planner
Just enter the operators you own and it automatically builds the whole A/B two-shift assignment for the 243 base (factories, trading posts, power plants, control center, reception room, and more) for you.
It isn't a tool that does 100% for you. By accounting for synergy sets, cross-facility point systems, and shift policy, it locks in 90%+ of the overall framework automatically — and is designed so you, the Doctor, finish the remaining 10% to fit your preferences and edge cases. Per-room manual edits, fill-empty-slots, per-operator Elite adjustment, and production-priority modes are all supported.
Choose a production priority: Gold-first, Battle Record–first, or Balanced
Auto-detects faction synergies (e.g. the Kjerag trading-post set) and token systems (Worldly Plight, etc.)
Three roster-import paths — MAA file, game-screenshot recognition, or Yostar account login (syncs your actual roster in one go)
Base layout presets (243 · 153 · 252 · custom), power & facility-level management, and recommendations for which operator to raise next
Export/import assignments; can include future (CN-first) operators in the calculation
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Operator Encyclopedia
Every operator's stats, skills, talents, potentials, modules, and base skills in one place.
Filter by faction, class, subclass, combat tags, and synergy concepts; search by name, nickname, or effect
Per–Elite-phase stats and range, skill SP and duration, module stats and effects in full detail
Synergy (concept-deck) tags group operators that work well together
Community-submitted nicknames are tallied and made searchable — find operators by nickname too
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Enemy Handbook
Stats, abilities and immunities for 1,500+ enemies — and a reverse lookup of the operations each one shows up in.
Filter by class (Normal/Elite/Boss), race, melee/ranged, ground/flying, and damage type
Compare stats across reinforcement tiers side by side — the same enemy scales with stage difficulty
Status immunities (stun, silence, freeze…) are listed so you know what actually lands on it
“Where have I seen this one?” — appearances grouped by zone, with spawn counts
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Stage Handbook
Terrain layouts for 2,200+ operations, with sanity cost, enemies and drops on one screen.
Filter Main Theme, Intermezzi, events, Annihilation, supply and SSS by category and zone
In-game terrain images where they exist; where they don't, the tile grid is rendered from level data
Tap an enemy to jump straight to the Enemy Handbook — reinforced variants are marked with ★
In-game drop frequencies included. Measured rates and sanity efficiency live in the Material Farming Helper
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Stage Simulator
Pick an operation and replay its enemy spawn timeline — when each enemy appears, which route it takes, and where it goes.
Jump in from search or the picks (latest event, Main Theme, Annihilation) and it starts playing right away
Enemy-portrait tokens run along their actual routes, with playback speed and seeking
A baseline timeline with no blocking — conditional reinforcements (kill-count branches, etc.) are excluded
The same simulation is available from the Enemy routes tab on stage pages and Integrated Strategies combat nodes
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Public Recruitment Helper
Calculates which guaranteed or high-rarity operators a recruitment tag combination can yield.
For each selected tag combo, shows the possible operators and the minimum guaranteed rarity
Ranks guaranteed high-rarity combos first so you don't miss them
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Material Farming Helper
Shows which stage is most efficient for each Elite material, from measured drop statistics.
Expected sanity-per-item (sanity ÷ drop rate) per material, with a best-efficiency badge on the top stage
Based on Penguin Statistics real drop rates + extracted game data; only currently released stages
Rarity filter, name/nickname search, permanent-only toggle; click a material for its recipe and uses
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Operator Upgrade Sim
Totals the LMD, EXP, and materials an upgrade will cost, up to your target step.
Level and Elite chain in game order (E0 max → Elite 1 → E1 max → …), and you type the exact target level
Skill levels 2–7, masteries 1–3 per skill, and module stages 1–3 accumulate to a target per group
Queue several operators, save the totals as a share link — see exactly what and how much to farm
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Story
Terra Chronicle — events, main story, and Integrated Strategies on a Terra-calendar timeline
Read event and main stories two ways: the full script, or an AI digest.
Full-script reader — every in-game line with cutscenes and speaker portraits, binge the story outside the game
Dotted-underlined characters and terms in the text open a popover right where you're reading
AI digests for busy Doctors — written from the full script, the plot in about 10 minutes
A Terra chronology timeline plus by-theme grouping — theme links are shareable URLs
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Integrated Strategies Guide
Every IS theme's floor layouts, battle nodes, enemy dex, relics, and ending conditions — all difficulty-aware, fully localized in Korean, English, and Japanese.
All five released themes, from Phantom & Crimson Solitaire to Sui's Garden of Grotesqueries — plus the CN-first theme via the future-data toggle
Node maps per floor with in-game previews, enemy rosters, spawn counts, emergency multipliers, and wiki-verified encounter floors
The enemy dex recalculates stats live as you change the difficulty grade
Relics, encounters, and ending unlock conditions are cross-linked and clickable — with plain explanations of what each node actually does
An inventory for collectibles & theme resources, plus game-screen recognition — Screenshot Radar reads screenshots, and PRTS Link (BETA) attaches to your game window live, auto-navigating as you play and recording the run as a replay
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Reclamation Algorithm Guide
The permanent RA season “Tales Within the Sand” and the CN-first new season “Reboot Anchor”, straight from game data.
Food & drink — recipes with their α/β/γ variant effects, every ingredient cross-linked to where it drops and what it cooks into
All 106 areas — in-game blueprints, movement-route simulation, enemy stats, and resource objects plotted on the tile map
Crafting, structures, encounters, rifts, expeditions and the tech tree as cards with full detail modals, plus an RA-only enemy dex
The CN-first season keeps Chinese as the source text with an unofficial translation alongside — including 171 battle-terrain blueprints and the grid node map
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Stronghold Protocol Guide
Alliances, operators, enemies and the Supply Center of Stronghold Protocol Season 2 “Alliance”, straight from game data.
23 alliances — 8 nation and 15 trait alliances with every activation threshold and its full effect text, plus the operators in each, grouped by tier
112 operators — the garrison ability unique to each one, compared side by side at base and Golden, with the full text of every skill and module they own
Free-pick slots — the 68 6★ outside the shop roster, plus the 17 stand-in units that deploy when you don't own the operator
Enemies — 10 leaders (3 hidden) and 119 Tactical Training enemies across 7 types as portrait cards; tap one for the same stats and abilities as the enemy index
Supply Center — buy/sell price and promotion, level, skill and module values per tier, level-up cost and display slots per mode, and the 6★ roster you can drop into a free-pick slot
Turn on 'Include future data' in the header to preview operators, materials, and events not yet released (CN-first). Unreleased text is provided as an unofficial AI translation until launch — clearly labeled as such — and is automatically replaced with official data once the release lands in the source.
Data & updates
Data is based on community game-data extracts (ArknightsGamedata) and real drop rates from Penguin Statistics. When a new version ships, an automated pipeline detects it and regenerates the operator, base, recruitment, farming, and upgrade data together — so the site catches up quickly after each update.
Unofficial fan site
Terra Archive is an unofficial, non-commercial fan site unaffiliated with Hypergryph or Yostar. All in-game images, names, and story text remain the property of their respective owners, and we respect the fan-content guidelines. It is not operated for profit.
Report errors or suggest features via the feedback button on each page.
For anything else — copyright or takedown requests included — write to [email protected].