Better Submarine Upgrades - 更好的潜艇升级

Better Submarine Upgrades v1.1.0

Your submarine, capable of so much more.

Frustrated by the lack of upgrades in vanilla? Every playthrough feels the same — max out hull, upgrade the reactor, buff the turrets, and that's it. Same routine, different submarine.

This mod exists to break that cycle.

3 Submarine Classes, 3 Distinct Progression Paths

Attack, Transport, and Scout are no longer just names — their upgrade paths are fundamentally different:

• Attack: Lower turret power consumption, faster traverse, higher fire rate, more capacitor capacity, and an exclusive [Pulse Laser Overload] upgrade. A pure firepower machine.

• Transport: Extremely thick hull, doubled pump efficiency, lightning-fast repairs, and exceptional fuel economy. Survival as a way of life.

• Scout: Powerful engines, extended sonar range, minimal noise signature, and long-lasting batteries. Spot them first, disengage first.

Every upgrade level delivers a tangible difference, not just a number change.

40 Upgrades, Covering Every System

From hull reinforcement, fabrication speed, turret components, reactor output, power systems, junction box fireproofing, noise reduction, to even independent door reinforcement — every detail can be upgraded. Each upgrade has its own Tier unlock curve, progressively unlocking as the campaign advances. You won't max everything on day one — every station visit presents a new strategic choice.

Enemy Scaling, Dynamic Challenge

• Enemy Upgrade Sync (Lua): Your enemies no longer stagnate. Upgrades you purchase at stations are applied to enemy submarines (with category-specific scaling). Enemies grow stronger as you do, keeping the challenge alive.

• AI Vision Link (Lua, both sides): Your AI crew's vision range expands with your periscope upgrades, improving team coordination. However, enemy AI vision scales accordingly, making stealth tactics more difficult and adding real strategic depth.

• Plant & Mineral Scanning (Lua): The mineral scanner now detects both ore veins and wild plants — no more aimless searching.

Global Sync Toggle (Experimental)

This mod provides console commands to manually toggle enemy upgrade synchronization for testing or difficulty adjustment:

• bsusync — Toggle sync state

• bsusync on — Enable sync

• bsusync off — Disable sync

Enabled by default.

Recommended Synergy

• Recommended to use alongside Enhanced Pirates & Faction Bounty - Reconstructed (not required, just a synergy recommendation) — both work great together, putting your submarine upgrades to the test against smarter enemies.

Details That Enhance Immersion

• A tiered material system with real texture: hull upgrades from levels 1-2 use Aluminum, mid-game transitions to Steel, and late-game demands Titanium-Aluminum Alloy and even Physicorium — worldbuilding that feels tangible.

• Multi-layered defense upgrades — door hardening, blast resistance, fireproof coatings, overload protection — turning "survival" into a tactical consideration.

• A brand new Oxygen Generator category (not present in vanilla), allowing for more specific life support customization.

Compatibility & Stability

• Adding this mod mid-campaign will inherit existing upgrade levels, but due to different per-level attributes in vanilla, final values may differ from intended caps

• Fully standalone — no dependency on any other mod

• Full bilingual support: Simplified Chinese + English

• Compatible with game version 1.13.4.0 (v1.1.0) — tested and verified

It doesn't make your submarine invincible. It makes it truly yours.

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Changelog

v1.1.0:

• Added Ammo Box Upgrades: Ammo box items are now more durable, improving logistical sustainability.

• Added Item Sync Upgrade Mechanism: Newly spawned items on submarines will also benefit from upgrade bonuses without requiring manual reinstallation.

• Upgrade Text Fixes: Fixed display errors in several upgrade descriptions.

v1.0.5:

• Added plant scanning: PlantScanner.lua adds ore tags to wild plants — the mineral scanner now detects plant locations alongside mineral deposits.

• Optimized material cost curve: Hull upgrades now use a tiered material system — from Aluminum/Iron/Steel in the early game, smoothly transitioning to Titanium-Aluminum Alloy and Physicorium in the late game.

• Fixed localization issue: Fixed missing text for the Pulse Laser Charger (Pulse Laser Overload) upgrade.

• Improved enemy scaling: Refined enemy AI vision link (NpcSightLinkTurretUpgrade) and enemy submarine upgrade sync (EnemyUpgradeSync) logic — your vision upgrades now affect enemy AI as well, making combat more challenging.

• Fixed AI firing distance calculation: Fixed a calculation error that caused AI gunners to fire at targets far beyond intended range.

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Credits

• 「Meaningful Upgrades」: Original framework and upgrade system (Workshop Link)

• 「Extended Upgrades」: Submarine class differentiation and Pulse Laser overload design (Workshop Link)

• 「Upgradable Ammo Boxes」: Textures and inspiration (Workshop Link)