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Marchlord

Forge your realm together.

Marchlord is our co-op campaign framework for Mount & Blade II: Bannerlord: stable 4-player campaign sessions first, deep mod compatibility second, and a living-world layer once the foundation is proven.

The flagship compatibility target is Banner Kings, with RBM next. War Sails support is planned as an optional naval submodule; the core experience will work without the DLC.

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Unofficial mod project for Mount & Blade II: Bannerlord. Not affiliated with TaleWorlds Entertainment.

In Design Steam Workshop · PC
Bannerlord ModCo-op CampaignLiving WorldBanner Kings Bridge

Co-op campaign first

Start with a stable shared campaign, then expand into separate clans, battle instancing, and larger parties.

Bridge-friendly by design

Banner Kings is the main overhaul target, with a public bridge path for other major mods and total conversions.

Alive world modules

Optional layers can add soldier service, veteran companions, court pressure, settlements, and survival systems without bloating core.

Roadmap

Build order

Marchlord grows only when the foundation earns it. Core co-op first, Banner Kings compatibility as the flagship bridge, then living-world modules as separate installs.

Phase 0 Now

Foundation

Pin the target game version, study existing co-op work, scaffold the SDK, and prove the first connection path.

  • Reference DLL mirror
  • SDK interfaces
  • Build pipeline
  • First host-client session
2
Phase 1 Next

Stable Same-Clan Co-op

Ship the safest playable base: 4 players in one clan, synchronized campaign time, save/load checks, and core vanilla systems.

  • 4-player campaign
  • Time control
  • Conversation locks
  • Save compatibility checks
3
Phase 1.5 Gated

Allied Clans

Move toward separate player clans only after the simpler co-op path survives long stability runs.

  • Separate clan authority
  • Diplomacy sync
  • Mixed-clan save/load
  • Default flip after tests
4
Phase 3 Flagship

Banner Kings Bridge

Make the first big compatibility bridge the one that matters most: Banner Kings, followed by RBM.

  • Banner Kings systems
  • RBM bridge
  • Bridge author guide
  • Compatibility test year
5
Phase 3.5 Prototype

Career & Retinue

Add the rise-from-nobody fantasy as an optional module once the core and Banner Kings path are stable.

  • Serve as soldier
  • Ranks and wages
  • Veteran-to-companion promotion
  • Service history
6
Phase 5 Later

War Sails Optional

Naval co-op ships as a separate submodule. Marchlord core stays playable for players without the DLC.

  • Sea travel sync
  • Naval battles
  • Fleet command
  • DLC-gated install path