Do I need the base game to play CATAN expansions?

Yes. All expansions require the CATAN base game.

Can I combine CATAN expansions?

Some combinations are officially supported, especially Seafarers with Cities & Knights. Others need custom rules.

Does the generator support combined expansions?

Not yet. Combined-expansion support is on the roadmap for 2026.

Is Seafarers compatible with the 5-6 player extension?

Yes. There is official Seafarers 5-6 compatibility via extension components.

Which expansion has the most board variety?

Seafarers currently offers the widest practical board variety.

Does the balance algorithm work differently for expansions?

Yes. Expansion variants use adjusted weights and map constraints per mode.

Can I use the Seafarers generator for any scenario?

Current implementation targets standard scenario patterns; more official presets are planned.

What's the most strategic CATAN expansion?

Cities & Knights is widely considered the deepest expansion strategically.

CATAN Expansion Board Generator

Balanced board generation for every CATAN variant. Pick your expansion and generate.

AvailableBase GameAvailable5-6 PlayersAvailableSeafarersAvailableCities & KnightsPlannedTraders & Barbarians

Seafarers of CATAN

Available

Island exploration, ship routes, and gold terrain maps with expansion-aware balancing logic.

Sea hexesMultiple islandsGold terrainShips replace roads

Generate Seafarers Board View Setup Guide

5-6 Player Extension

Available

Extended board geometry for larger groups with algorithm tuning for denser opening competition.

30 hexes28 number tokens11 portsSpecial Building Phase

Generate 5-6 Player Board

Cities & Knights

Available

Science, trade, and politics profile with city-upgrade and defense-aware weighting in the generator.

City upgradesKnight defenseProgress cardsReweighted resources

Generate C&K Board Learn More

Traders & Barbarians

Planned

Five scenario styles with caravan routes, barbarian villages, and modular objective changes.

Scenario-basedCaravansVillage interactionsHigh replay variety

View Roadmap

Explorers & Pirates

Planned

Mission-driven expansion focused on exploration objectives, pirate routes, and adventure pacing.

Mission systemPirate lairsExploration focusObjective scoring

View Roadmap

Which CATAN Expansion is Right for You?

Quick comparison for expansion selection and purchase decisions.

Expansion	Strategy Depth	Learning Curve	Game Length	Players	Board Change
5-6 Players	★★★	Low	+30 min	Up to 6	Larger map
Seafarers	★★★★	Medium	+45 min	3-4	Sea + islands
Cities & Knights	★★★★★	High	+90 min	3-4	System overhaul
Traders & Barbarians	★★★★	Medium	+60 min	3-4	Scenario-based
Explorers & Pirates	★★★★	Medium-High	+60 min	3-4	Mission-focused

First expansion: Seafarers for highest accessibility.

Most depth: Cities & Knights for strategic complexity.

More players: 5-6 extension for easiest scaling.

How Expansions Change the Board

How Seafarers Changes the Board

New terrain and topology

Sea hexes shape ship-only expansion paths.
Gold terrain can convert into any resource and changes scarcity dynamics.
Multi-island layouts create travel-cost and route-value decisions.

Ships vs roads

Ships use wood + wool and only extend on sea lanes.
Rear ships can be repositioned under legal conditions.
Network continuity now depends on coastline access and lane pressure.

Seafarers balancing includes island resource spread, gold accessibility, route symmetry, and starting-island versus exploration-island value ratios. Plain random shuffling is not enough for fair Seafarers boards.

Generate Seafarers Board

Cities & Knights Updates

Subscribe for mode updates, balance model changes, and new scenario presets.

Expansion FAQ

Ready to explore beyond the base game?

Start with Seafarers, the most accessible expansion with broad board variety.

Generate Seafarers Board Compare All Expansions

Continue Learning

Board Generator

Base-game balanced board generation in one click.

Strategy Guide

Learn opening logic and expansion-aware resource priorities.

Setup Guide

Step-by-step setup with distance-rule visuals.

Rules Reference

Fast lookup for building, robber, and trade disputes.

Expansion hub uses a hub-and-spoke architecture: this page routes players to dedicated variant pages and tools.