MonstersGordion

Dynamic, configurable spawning of vanilla Lethal Company monsters inside the Company building on 71-Gordion, on the navmesh baked by NavMeshInCompanyRedux. Host-authoritative: only the host spawns, clients receive enemies through the game's own netcode — so only the host strictly needs this mod (everyone needs NavMeshInCompanyRedux).

Built and tested against game v81.

Features

• Timer-driven spawn cycle with a random interval in [MinSpawnInterval, MaxSpawnInterval].
• Per-enemy config blocks (Enabled, SpawnWeight, MinSpawnCount, MaxSpawnCount) generated for every spawnable enemy type found in the game, modded ones included (unknown types default to disabled).
• Global alive cap; enemies from the game or other mods count toward it by default, so combined populations stay bounded.
• Reachability-safe spawn points: the interior navmesh is split into connected regions and every spawn point / patrol node must have a complete path to the main hall — no more monsters stuck on roof patches, shelf tops or in pits.
• Floor balance (UpperFloorSpawnShare): configurable split between the ship-landing level and the basement, instead of pure area weighting.
• Outdoor/indoor pool split (OutsideEnemyShare): each spawn rolls which pool to pick from, so dogs/giants/Old Birds actually show up when enabled.
• Interior patrol nodes are generated on the navmesh (the Company building has none), and spawned enemies are forced into interior AI mode.
• RespawnOnLoad: wipe and repopulate on every landing, or top up existing.
• Verbose DebugMode logging of every decision the spawner makes.

Dependencies

Required (declared in the Thunderstore manifest):

Optional, auto-detected at runtime (no hard dependency):

Installation

r2modman / Thunderstore Mod Manager: install from Thunderstore; dependencies are pulled in automatically.

Manual: drop MonstersGordion.dll into BepInEx/plugins/ and install the required dependencies yourself.

Configuration

BepInEx/config/Timofey.MonstersGordion.cfg, created on first run. Changes require a game restart (standard BepInEx behaviour).

Per-enemy sections: [Enemy.Flowerman], [Enemy.Bunker Spider], … with Enabled, SpawnWeight, MinSpawnCount, MaxSpawnCount. Defaults: interior threats enabled; outdoor giants/dogs/Old Birds, bees, Butler Bees and Manticoil disabled (enable them yourself); Lasso and Red pill hard-excluded.

Building from source

Requires the .NET SDK 8+ and NuGet access — game assemblies come from the LethalCompany.GameLibs.Steam package (stripped + publicized), no manual DLL copying.

dotnet build -c Release

Output: bin/Release/netstandard2.1/MonstersGordion.dll. Set the LC_PLUGINS environment variable to your plugins folder to auto-copy after each build.

To assemble the Thunderstore package zip:

powershell -ExecutionPolicy Bypass -File build-package.ps1

Project layout

MonstersGordion/
├── MonstersGordion.csproj      # SDK project, NuGet-only references
├── NuGet.config                # nuget.org + BepInEx feed
├── manifest.json               # Thunderstore manifest
├── icon.png                    # Thunderstore icon (256x256)
├── CHANGELOG.md
├── build-package.ps1           # builds dist/MonstersGordion-<ver>.zip
└── src/
    ├── Plugin.cs               # BepInEx entry point, Harmony bootstrap
    ├── PluginConfig.cs         # all config entries incl. per-enemy blocks
    ├── EnemyCatalog.cs         # EnemyType discovery + exclusions
    ├── NavMeshSampler.cs       # tiered, reachability-checked point sampling
    ├── LandingWatcher.cs       # polling-based landing/leave detection
    ├── CompanyMonsterSpawner.cs# timer, pools, weighted pick, caps, cleanup
    ├── Patches/                # ShipLeave/OnDestroy cleanup, death logging
    └── Compat/                 # ToilHead, StarlancerAIFix, BCME, scanner

How it works (short)

On every landing on Gordion (detected by polling StartOfRound.shipHasLanded, host only) the mod triangulates the navmesh, welds it into connected regions, anchors reachability in the main hall, generates patrol nodes, and starts the spawn coroutine. Each cycle: roll interval → check GlobalCap → fill MinSpawnCount deficits first, otherwise roll outdoor/indoor pool → weighted pick → tiered reachable spawn point → RoundManager.SpawnEnemyGameObject → two frames later force interior AI (SetEnemyOutside(false), custom node set, agent warp) and roll the ToilHead turret. Leaving the moon stops everything and (by default) despawns the mod's enemies.

Changelog

1.2.1

• New icon: a red bestiary-scan look (dark red scanlines, vignette, corner viewfinder brackets, blood glow). No code changes — republished so the store page shows the new artwork.

1.2.0

• Per-enemy ToilHead settings for every turret-capable enemy. ToilHead can put a turret on three enemies — Coil-Head, Manticoil and Masked — and each has a regular and a Slayer (minigun) variant. Previously only Coil-Head and Manticoil shared a single chance and Masked could not be configured at all. The old [Integration] ToilHeadSpawnChance / ToilSlayerChance are replaced by a [ToilHead] section: CoilHeadTurretChance/CoilHeadSlayerChance, ManticoilTurretChance/ManticoilSlayerChance, MaskedTurretChance/MaskedSlayerChance. Masked support was added to the reflection bindings (SetToilMaskedOnServer / SetSlayerMaskedOnServer).

1.1.1

• Giant Kiwi enabled by default — confirmed working: it is nest-requiring and the mod already places its nest on the interior navmesh automatically (the 1.1.0 notes wrongly listed it as unconfirmed).
• Removed the stale Old Bird note ("cause not yet confirmed") — its instant-death was the missing nest, which automatic nest placement fixed; working enemies no longer log warning-level notes on every landing.

1.1.0

First stable release. Bundles every fix from the 1.0.x line and ships a curated default roster of enemies that work correctly inside the Company building.

• Enabled by default: all interior enemies plus Stingray and Tulip Snake, and the outdoor threats that path fine indoors — Baboon Hawk, Eyeless Dog, Forest Keeper and Old Bird (the Old Bird has its nest placed automatically and is locked to the upper floor).
• Disabled by default (they don't work correctly on Gordion yet, but remain in the config/code and on the experimental git branch): Feiopar, Cadaver Growths, Cadaver Bloom, Bush Wolf, Earth Leviathan, Giant Kiwi, Manticoil and the bees. The experimental FeioparFakeTrees also defaults off.
• Includes: enemy targeting fix (TreatEnemiesAsOutside), reachability-checked spawns with upper/lower floor balance, whitelist mode, per-mod foreign-enemy policy, automatic nest placement for nest-requiring enemies, the maintenance pass (AI re-apply, stranded-enemy rescue, idle-stalker nudge), auto-disable of types that keep dying instantly, and full spawnability logging.

1.0.12

• Diagnostic for the vain-shroud hook. RoundManager.LoadNewLevel is patched to grow weeds, but its log never appeared — the hook may be bypassed (LethalLevelLoader reworks level loading) or bail on the level check. The prefix now logs unconditionally at entry (planet, scene, levelID, isCompany) so the next landing shows exactly whether it fires and why weed generation is or isn't happening.

1.0.11

• No more spawn spam from enemies that can't survive here. Some enemies destroy themselves on spawn via Destroy() (not KillEnemy), so the counter never rose and they were re-spawned endlessly — most visibly Cadaver Growths (CadaverGrowthAI logs "Found no dungeon" and self-destructs). The mod now watches spawns and, after a type dies within a few seconds twice, disables it for the rest of the landing with a clear log line. Cadaver Growths and Cadaver Bloom are also disabled by default now.
• Idle-stalker nudge. An owned enemy that stands essentially still for ~25 s is re-pathed to a fresh reachable point — this unsticks Feiopar (which parks on a fake tree and stops) and any other stalled enemy. Ambush-by-design enemies (Bracken, Coil-Head, Barber, Jester, Ghost Girl, Cadaver Bloom) are exempt so they behave normally.
• Vain shroud diagnostics. The level-load weed setup now always logs the Bush Wolf enabled state, the configured and resolved iteration counts, and the level's current moldSpreadIterations, so a failed weed generation can be diagnosed from the log.

1.0.10

• Whitelist mode. New [Advanced] ExcludedEnemiesIsWhitelist (default false): flip it and the ExcludedEnemies list becomes an allow-list — only the listed types may spawn, everything else is excluded. Lasso and Red pill stay excluded regardless, and an empty list in whitelist mode logs a warning (nothing would spawn). It also feeds ForeignEnemies=RemoveExcluded, so whitelist + that policy strips any non-listed enemy other mods spawn, letting you pin the whole moon to a chosen set of enemies.

1.0.9

• Old Bird upper-floor lock. New [Balance] OldBirdUpperFloorOnly (default true): the Old Bird (RadMech) spawns only on the ship-landing level, ignoring UpperFloorSpawnShare. It is huge and the basement is cramped, so it fights far better upstairs.
• Feiopar (PumaAI) can stalk again — experimental. PumaAI only stalks from objects tagged Tree; the Company building has none, so ChooseTargetTree finds nothing and Feiopar never sets a destination (it just stands there). New [Integration] FeioparFakeTrees (default true) fabricates tree nodes on the interior navmesh, each with the overhead canopy collider (layer 25) that PumaAI.Start validates against, and clears PumaAI's static tree cache so it adopts them. It may perch oddly near the ceiling — set the flag to false if it looks broken.

1.0.8

• Corrected the nest attribution. The nest-requiring enemy in vanilla v81 is the Giant Kiwi (GiantKiwiAI, birdNestPrefab), not the Old Bird — the 1.0.7 notes were wrong. The nest feature is data-driven off the EnemyType flags, so it already served the correct enemy; only the documentation is fixed.
• Old Bird (RadMech) instant-death is still open. It does not use a nest, so 1.0.7 did not address it. Added an early-death diagnostic: when an enemy we spawned dies within 4 s, the log records its AI class and a stack trace naming whatever called KillEnemy, so the real cause can be identified from one landing instead of guessed.

1.0.7

• Nest-requiring enemies work now. EnemyAI.Start contains if (!foundNest && enemyType.requireNestObjectsToSpawn) { isEnemyDead = true; Destroy(gameObject); }, and Gordion places no nests during level generation, so such an enemy destroyed itself one frame after spawning. The mod now places the enemy's own nest prefab on the interior navmesh (properly network-spawned) before spawning it; the enemy finds it, teleports onto it via UseNestSpawnObject and lives inside the building. Nests are cleaned up when the ship leaves. (In v81 this is the Giant Kiwi — see 1.0.8; the 1.0.7 notes mis-named it the Old Bird.)
• If a nest cannot be placed, the enemy is skipped with a logged reason naming its AI class instead of being spawned into an instant self-destruct.

1.0.6

• Vain shrouds can now be grown on Gordion, which makes the Kidnapper Fox (Bush Wolf) playable instead of excluded. New [Integration] VainShroudIterations: the mod sets the level's own moldSpreadIterations before load, so weeds are generated and network-synced through the vanilla path (clients need no mod). 0 = automatic — weeds grow only when Bush Wolf is enabled. Bush Wolf is no longer force-excluded; it is simply skipped, with a logged explanation, if no weeds exist on the moon.
• Correct defaults for the v81 vanilla enemies that previously fell through to the "unknown, disabled" fallback: Feiopar (PumaAI), Cadaver Growths (CadaverGrowthAI), Cadaver Bloom (CadaverBloomAI), Stingray (StingrayAI) and GiantKiwi (GiantKiwiAI).
• Spawnability report in the log. Every landing now lists the resulting spawn pool and, for anything that will not spawn, the enemy name, its AI class and the concrete reason (no prefab, blacklisted, Enabled = false, SpawnWeight = 0, MaxSpawnCount = 0, or an unmet map requirement).
• Enabled enemies with known map caveats now log them: Bush Wolf's weed requirement, Cadaver Bloom being a dormant seed that only Cadaver Growths plants and wakes (enable Cadaver Growths instead of spawning Blooms directly), Feiopar's tree stalking, and Earth Leviathan's burrowing.

1.0.5

• Enemies can finally see, chase and kill you. EnemyAI.PlayerIsTargetable requires player.isInsideFactory != enemy.isOutside, and players inside the Company building are not flagged as being in a factory (there is no EntranceTeleport there). Enemies were being flagged as interior, so the check failed for every player — Masked walked up and calmly walked away, MeetsStandardPlayerCollisionConditions refused every kill, and many AIs had no valid target to path toward. Spawned enemies are now flagged as outdoor enemies ([Advanced] TreatEnemiesAsOutside, default true) while still being pointed at interior patrol nodes.
• Patrol nodes are now created twice per position, tagged AINode and OutsideAINode, so an AI that re-resolves its nodes lands inside the building either way instead of trekking to the outdoor node field.
• New maintenance pass ([Advanced] MaintenanceInterval, default 3 s): re-applies AI flags and node sets to spawned enemies, and teleports any enemy that ended up somewhere unreachable back onto the interior navmesh.
• The blacklist now applies to the whole moon: [Advanced] ForeignEnemies (default RemoveExcluded) despawns blacklisted enemy types even when another mod spawned them (vanilla spawn cycles, BrutalCompanyMinus, MoreEnemies), which is why blacklisted baboon hawks and worms could still appear. Ignore restores the old behaviour; RemoveNotEnabled also removes types with Enabled = false. Enemies in a kill animation are never removed.
• Bush Wolf (Kidnapper Fox) is now excluded automatically with a logged reason: BushWolfEnemy.Start() kills itself immediately when the map has no vain shrouds to hide in, and Gordion has none.

1.0.4

• No gameplay changes: version bump for Thunderstore (1.0.3 was already published there) with the website_url pointing to the GitHub repository.

1.0.3

• Manticoil is now disabled by default (it behaves erratically on Gordion); enable it in [Enemy.Manticoil] if you want it back — the ToilHead "Manti-Toil" integration still applies.
• Floor balance: new [Balance] UpperFloorSpawnShare (default 70) — percentage of spawns placed at the ship-landing level; the rest go to the basement. Previously the much larger basement floor dominated the area-weighted pick and acted as a funnel.
• Outdoor/indoor pools: new [Balance] OutsideEnemyShare (default 50) — each spawn first rolls whether to pick from outdoor enemy types (dogs, giants, baboon hawks, Old Birds...) or indoor ones, then runs the weighted random within that pool.
• Region filtering relaxed: all navmesh regions with a complete path to the main-hall anchor are now eligible (previously only the single largest region), so a legitimately connected upper floor can no longer be discarded wholesale.

1.0.2

• Reachability check: spawn points and patrol nodes are now validated with connected-region analysis plus NavMesh.CalculatePath to a main-hall anchor. Enemies can no longer spawn on roof patches, in pits or other one-way spots they cannot walk out of (fixes the vanilla "eliminated all possible nodes" AI error).
• Fixed ToilHead and StarlancerAIFix being reported as "not detected" even when installed: detection no longer relies on PluginInfo.Instance and falls back to scanning loaded assemblies.
• ToilHead integration bound to the exact ToilHead 1.9.1 API (Api.SetToilHeadOnServer / Api.SetMantiToilOnServer); added [Integration] ToilSlayerChance (default 0) for the minigun turret variant.
• StarlancerAIFix is intentionally no longer invoked manually: its EnemyAI.Start postfix runs automatically, and this mod's interior node assignment executes afterwards so it takes precedence on the surface-level Company moon.

1.0.1

• Landing detection rewritten from a Harmony hook on the doors-opening sequence to polling StartOfRound.shipHasLanded (LandingWatcher) — robust against other mods transpiling the landing coroutine; includes a 20 s fallback trigger.
• Explicit landing diagnostics in the log (planet, scene, host flag, company-moon flag), including a clear message when the session is not the host.

1.0.0

• Initial release: timer-driven weighted spawning of vanilla enemies inside the Company building on the NavMeshInCompanyRedux navmesh, with per-enemy Enabled/weight/min/max, global cap, RespawnOnLoad, debug logging, generated interior patrol nodes, and host-only network-authoritative spawning.