anno-117-docs/docs/systems/skill-tree.md

# Skill Tree (Research)

The Skill Tree is Anno 117's research system where players spend Knowledge to unlock new buildings, bonuses, and abilities.

## Overview

- **Currency:** Knowledge (generated by residences and certain buildings)
- **Categories:** 3 main branches
- **Skill Types:** Discovery, Node, Repeatable

## Skill Categories

### Economy (Wirtschaft)

Economy skills enhance material productivity and resource management.

**Key Skills:**

| Skill Name | Cost | Effect |
|------------|------|--------|
| Fish Markets | 11,800 | Sardine Hut and Cockle Farm: +3 Income area effect |
| Trading Post Management | 4,800 | Unlocks Trading Post upgrade |
| Sewing Circles | 8,000 | Spinners: +1 Knowledge area effect |
| Replanting | 4,000 | Charcoal Burners can use meadows (requires Celtic path, Smiths) |
| Depots | 4,800 | Unlocks Depot, +1 Depot build right |
| Warehouse Management | 4,800 | Unlocks Warehouse upgrade |
| Better Bellows | 4,000 | Coal-dependent buildings: +20% fuel efficiency (requires Roman path, Mercators) |
| Paved Roads | 4,000 | Unlocks Paved Roads for faster transport |
| Forest Rebirth | 18,000 | Lumberjacks can plant trees on meadows |
| Albion Seaport | 18,000 | Place Albion coastal productions in open water |
| Swamp Watch | 32,000 | Place City Watches in swampland (requires Celtic path, Smiths) |
| Loyal Waders | 32,000 | Praetor's Villa: +25 Waders workforce |
| Drainage | 32,000 | Unlocks Drainage Canal and Lock Gate (requires Roman path, Mercators) |
| Hydraulic Mining | 46,000 | All Mines can benefit from Aqueduct productivity boost (requires Celtic path) |
| Aqua Arborica | 32,000 | All Plantations benefit from Aqueduct irrigation (requires Roman path) |
| Blood of Terra | 46,000 | All Islands: Iron Ore deposits 50% (Iron Mines produce without deposits) |
| Reservoir Basins | 64,000 | Aqueduct Basins: +50% water supply |
| Vino Veritas | 750,000 | All Islands: Grape cultivation 50% (Vineyards work without fertility) |
| Beaver Hunting | 750,000 | Beaver Trappers: +25% productivity, can use forests/meadows |
| Pillars of Community | 750,000 | Praetor's Villa: +25 Smiths workforce, +25 Mercators workforce |
| Depths of the Mountain | 1,500,000 | Mines: +5% productivity |
| Lift Locks | 750,000 | Lock Gate: +80 drainage channels |
| Trading Pier | 220,000 | Unlocks Pier for improved loading |
| Solid Foundations | 360,000 | Place harbor buildings in open water |
| Quay Walls | ? | Unlocks decorative Quay Walls |
| Depotism | 220,000 | +1 Depot build right |
| Trading Post Optimization | 750,000 | Unlocks Trading Post upgrade |
| Seaport City | 360,000 | Place buildings further from coast |
| Warehouse Improvement | 750,000 | Unlocks Warehouse upgrade |
| Honey-Sweet Flight | 750,000 | Beehives: +25% productivity, can use forests |
| Great Seaport City | 750,000 | Maximum building distance from coast |
| Trade Harbor | 750,000 | Specialize piers for specific trade goods |
| Well-Sorted Warehouses | 750,000 | Half cost for all Warehouses |
| Depths of Storage | 1,500,000 | +1 Depot build right |
| Latium Seaport | 36,000 | Place Latium coastal productions in open water |
| Servants | 36,000 | Praetor's Villa: +25 Liberti workforce |
| Mackerel Fishing | 64,000 | Scomber Huts produce without mackerel population (50%) |
| Field Irrigation | 64,000 | All Farms benefit from cistern irrigation |
| Reforestation | 64,000 | Resin Tappers can plant trees on meadows |
| Water Conservation | 92,000 | Water-consuming buildings: -20% water consumption |
| Hasty Horrea | 92,000 | Warehouses: +25% loading speed |
| Blind Obedience | 128,000 | Praetor's Villa: +50 Plebeians workforce |
| Ulex & Agogae | ? | All Islands: Gold Ore deposits 50% |
| Extra Horsepower | ? | Praetor's Villa: +50 Equites workforce |
| Flight of Birds | 750,000 | Bird Catchers: +25% productivity, can use forests/meadows |
| Bellows of Gobannus | 750,000 | Coal-dependent buildings: +30% fuel efficiency |
| Healthy Competition | 1,500,000 | Grants random legendary specialist (Economy/Finance/Nature) |

### Civil Society (Zivilgesellschaft)

Civil Society skills upgrade city administration and social structures.

**Key Skills:**

| Skill Name | Cost | Effect |
|------------|------|--------|
| Quartermastery | 4,800 | Flagship: -20% cargo weight slowdown, +2 cargo slots |
| Attractive Markets | 4,800 | All Islands: +25% Market effect range |
| Voluntary Vigilance | 8,000 | Vigiles: +1 available patrol |
| Night Watch | 8,000 | Custodes: +1 available patrol |
| Wells | 8,000 | Unlocks Wells (increase Fire Safety nearby) |
| Watchtowers | 8,000 | Unlocks Watchtowers (increase Happiness nearby) |
| Imperial Parades | 5,900 | Barracks: +2 Prestige area effect (requires Celtic path) |
| Cult of Minerva | 11,800 | Unlocks Minerva deity (Knowledge, Teaching, Weaving) |
| Inventive Spirit | 5,900 | Siege Workshop: +2 Knowledge area effect (requires Roman path) |
| Hospitality | 11,800 | Unlocks Officium specialist building |
| Portitores | 11,800 | Warehouses: -20% workforce, -10% maintenance |
| Latrines | 18,000 | Unlocks Latrines (increase Health nearby) |
| Trireme | 36,000 | Unlocks Trireme ship hull |
| Generous Hospitality | 64,000 | +1 Officium build right |
| Cult of Cernunnos | 32,000 | Unlocks Cernunnos deity (Forests, Albion productivity, Health) |
| Games of Tailteann | 32,000 | +20% Competition Ground effect range (requires Celtic path) |
| Large Loans | 92,000 | Unlocks large loans from rivals |
| Hazard Control | 92,000 | Vigiles: +1 Fire Safety area effect |
| Sanitary Measures | 92,000 | Medici: +1 Health area effect |
| Villa Visit | 128,000 | Praetor's Villa: +200 Prestige |
| Cult of Mercury Lugus | 32,000 | Unlocks Mercury-Lugus deity (Crafts, Trade) |
| Art of Giving | 92,000 | Unlocks large gifts to other Praetors |
| Shrine Building Allowed | 36,000 | +1 Shrine build right |
| Hippocratic Corps | 36,000 | Medici: +1 available patrol |
| Day Watch | 64,000 | Custodes: +1 Happiness |
| Lingua Romana | 32,000 | +20% Grammaticus effect range (requires Roman path) |
| Place of Arts | 220,000 | Half cost for all Ornaments |
| Marble Streets | ? | Unlocks Marble Streets (Prestige + faster transport) |
| Alliance Treaties | 220,000 | Unlocks military alliance proposals |
| Quinquereme | ? | Unlocks Quinquereme ship hull (requires Trireme) |
| Warmer Hospitality | 360,000 | +1 Officium build right |
| Praetorian Pumps | 220,000 | Vigiles: -20% response time |
| Cult of Epona | 180,000 | Unlocks Epona deity (Animals, Horses) |
| Fabulae Togatae | 220,000 | +20% Theater effect range |
| Quell Unrest | 220,000 | Custodes: -20% response time |
| Right to Repair | 360,000 | Vigiles can repair destroyed buildings |
| Epona's Hoofbeat | 360,000 | Equitum Campus: +2 Belief area effect |
| People's Shrine | 360,000 | +1 Shrine build right |
| Aleatorium | 180,000 | Unlocks Aleatorium (becomes Tier III+ need) (requires Roman path, Nobles) |
| Asclepius Codices | 360,000 | Medici: -20% response time |
| Seasoned to Taste | 750,000 | Garum becomes a need in Albion |
| Cerere et Baccho | 750,000 | Beer becomes a need in Latium |
| Solutio Ad Hominem | ? | Reveals legendary specialist/captain preferences |
| Phoenix from Ashes | ? | Vigiles: -50% rebuild time |
| Public Funding | ? | +20% City Watch effect range and response range |
| Open House | 1,500,000 | +1 Officium build right |
| Preservation Ordinance | ? | Water-dependent public services: -20% water consumption |
| Recruitment | 750,000 | Hire rival Praetors as specialists |
| Bright Minds | 1,500,000 | Grants random legendary specialist (Culture/Religion/Research) |
| Productive Cohabitation | 750,000 | Officium: +1 specialist slot |
| Via Tributum | 750,000 | Half cost for Paved and Marble Streets |
| Pax Amicitia | 750,000 | Masterful Negotiator diplomatic bonus |
| Divine Shrines | 1,500,000 | +1 Shrine build right |

### Military (Militar)

Military skills aid in warfare, defense, and naval combat.

**Key Skills:**

| Skill Name | Cost | Effect |
|------------|------|--------|
| Axe Bearers | 4,000 | Unlocks Axe Bearers unit (requires Celtic path, Smiths) |
| Carpe Civitas | 8,000 | Infantry: +50% torch-throwing speed |
| Protective Entourage | 8,000 | Auxilia: +75 Morale, +1 Toughness |
| Repair Cranes | ? | Unlocks Repair Crane for ships |
| Slingers | 4,800 | Unlocks Slingers unit |
| Armor Forges | 8,000 | Unlocks Armor production chain |
| Provisional Castra | 4,800 | Unlocks Field Camp command |
| Stamped Earth | 8,000 | All Islands: -30% wall maintenance |
| Coordinated Salvos | 11,800 | Towers: +10% attack speed |
| Legionnaires | 36,000 | Unlocks Legionnaires unit |
| Parmae | 64,000 | Equites Cavalry: +25 Morale, +1 Shield Protection |
| Target Practice | 92,000 | Unlocks Archer Reserve, +1 Archer Reserve slots |
| Tower Ballistae | 46,000 | Unlocks Tower Ballistae (requires Stone Walls) |
| Valetudinarium | 64,000 | Troops: +100% Field Camp healing |
| Stone Walls | 18,000 | Unlocks Stone Walls, Gates, and Towers |
| Cover Positions | 36,000 | Archers: +50 Morale, +1 Toughness |
| Parabolic Flight | 64,000 | Onagers: +15% precision, +5% attack speed |
| Balearic Ballistics | 92,000 | Slingers: +10% precision, +1 ranged attack |
| Scorpions | 32,000 | Unlocks Scorpions siege weapon |
| Manor Invictus | 180,000 | Praetor's Villa: +10% range, +1 ranged attack, +25% attack speed |
| Chariots | 180,000 | Unlocks Chariots unit |
| Tuatha De Danann | 180,000 | Axe Bearers: +100 Morale, +1 Toughness, +1 melee attack |
| Floating Catapult | 110,000 | Unlocks Ship Catapults |
| Fortified Trading Posts | 180,000 | Trading Posts: +5 ranged attack, +25% attack speed, +50% HP |
| Efficient Repair Crane | 110,000 | Repair Crane: +1 simultaneous repairs |
| Vitruvius-Style Crossbars | 180,000 | Scorpions: +15% range, +10% attack speed |
| Aux In, Aux Out | 180,000 | +1 Auxiliary Reserve slots |
| Manipel Maneuvers | 375,000 | Legionnaires: +100 Morale, +1 Toughness, +1 Shield Protection |
| Cataphracts | 180,000 | Cavalry: +1 Armor Protection |
| Arrow Rain | 375,000 | +1 Archer Reserve slots |
| Pro Domo | 180,000 | Praetor's Villa: +50% HP, +100% self-repair |
| Budget Palisades | 110,000 | Half cost for wooden walls and gates |
| Castrum Employment | 375,000 | Troops: -30% Field Camp maintenance |
| Praetorians | 375,000 | Unlocks Praetorian Cavalry |
| Tacking | 36,000 | Ships: +5% travel speed, -20% bad wind penalty |
| Ship Scorpions | 64,000 | Unlocks Ship Scorpions |
| Armored Hulls | ? | Unlocks Armored Hulls (requires stored Armor) |
| Cautious Greeting | 64,000 | Place Towers in water |
| Shipbuilder Studies | ? | Repair Crane: +25% repair speed, +20% radius |
| Imperial Measures | ? | Shipyards: +100% ship construction speed |
| Tower Proximity | ? | -25% minimum distance between towers |
| Stone by Stone | 1,500,000 | Walls: +5% HP |
| Equicurrian Chariots | ? | Chariots: +25% range, +1 ranged attack, +10% speed |
| Featherlight Frames | 750,000 | Siege Weapons: +1 Toughness, +10% attack speed |
| Campaign in Camp | 750,000 | Field Camp: +1 Happiness/Fire Safety/Prestige area effect |
| Brave Hearts | 1,500,000 | Grants random legendary specialist (Military/Seafaring/Civil Society) |
| Stable Construction | ? | Half cost for Stone Walls and Gates |
| Here Comes Cavalry | ? | Unlocks Cavalry Reserve, +1 Cavalry Reserve slots |
| Spathas | ? | Praetorian Cavalry: +50 Morale, +1 melee attack, +4 charge |
| Foundations of Eternity | 1,500,000 | Towers and Gates: +5% HP |

## Skill Types

### Discovery

The most common skill type. Must be reached via a research path. Some have unlock conditions such as:
- Hosting specific population types
- Choosing Celtic or Roman path in Albion
- Having specific goods in storage
- Reaching certain city status or population

### Node

Research branch connection points that often require meeting specific conditions before unlocking, such as:
- Building trade routes
- Generating minimum knowledge
- Reaching population thresholds
- Constructing specific buildings

### Repeatable

Skills that can be researched multiple times for incremental benefits.

## Regional Requirements

Some skills require choosing a specific path in Albion:

**Celtic Path (requires Smiths):**
- Imperial Parades
- Replanting
- Swamp Watch
- Hydraulic Mining
- Cult of Cernunnos
- Games of Tailteann
- Cult of Epona

**Roman Path (requires Mercators):**
- Inventive Spirit
- Better Bellows
- Drainage
- Aqua Arborica
- Cult of Mercury Lugus
- Lingua Romana
- Aleatorium

## Population Tier Translations

| German | English |
|--------|---------|
| Plebejer | Plebeians |
| Patrizier | Patricians |
| Wanderer | Waders |
| Schmiede | Smiths |
| Alteste | Elders |
| Mercatoren | Mercators |
| Edelmanner | Nobles |
| Liberti | Liberti |
| Equites | Equites |

## Related Topics

- [Citizen Needs](./citizen-needs.md) - Population requirements for skills
- [Settlement](./settlement.md) - Expanding to unlock regional skills
- [Specialists](../specialists/_index.md) - Characters unlocked via certain skills