Crimson Plugin Suite

In-editor documentation for all Crimson plugins.

DiscordDocumentation
CrimsonCore - Integration Example (Discord only)
CrimsonCore is a companion plugin that shows all Crimson systems working together in a real character, ability, and inventory setup. It cannot be distributed on the Fab marketplace because it depends on paid third-party plugins (Epic policy). Get it free from our Discord server.
Get CrimsonCore on Discord
Cardinal Rule
No Crimson plugin may depend on another Crimson plugin - except CrimsonCommon. Cross-plugin communication uses interfaces in CrimsonCommon, Epic standard interfaces, or GameplayMessageSubsystem broadcasts.

Integration

CrimsonCore

Reference game that wires the whole Crimson suite together.

  • Experience System
  • Asset Manager
  • Loot & Hotbar
  • GameFeature Actions

Foundation

CrimsonCommon

The shared contract layer every Crimson plugin builds on.

  • Replicated Tag Stacks
  • Message Bus
  • Ability-Set Bridge
  • Modular Base Classes

CrimsonSaveSystem

Fragment-based saving — each system owns its own data.

  • Independent Fragments
  • No Cross-Plugin Coupling
  • Blueprint-Ready

CrimsonUI

Game-agnostic CommonUI foundation for menus and HUDs.

  • Layer & Dialog System
  • Activatable Widgets
  • MVVM Base Classes
  • World-Space Indicators

CrimsonSettings

A data-driven, Blueprint-extensible settings framework

  • Declare options in a data asset
  • Persist them per-player with zero glue via a generic keyed store
  • Or bind them to game code - plus a CommonUI settings screen with search
  • Filtering
  • Presets
  • Profiles
  • Live preview
  • First-run wizard

Gameplay

CrimsonAbilitySystem

A full Gameplay Ability System layer for UE5.

  • Custom ASC & Abilities
  • Slot-Based Augments
  • Modifiers & Phases
  • Graph-Based Combos

CrimsonCamera

Mode-stacked, data-driven camera system with smooth blends.

  • Stackable Camera Modes
  • Runtime Push/Pop
  • Smooth Blends
  • Blueprint-Authored

CrimsonEquipment

Equipment slots that grant abilities and spawn gear.

  • Slot-Based Equipping
  • Grants Ability Sets
  • Spawns Visual Actors
  • Interface-Decoupled

CrimsonInput

Tag-driven Enhanced Input with GAS ability binding.

  • Ability Input Binding
  • Per-Player Rebinding
  • Settings Modifiers
  • CommonUI Actions

CrimsonInteraction

GAS-based interaction system for pickups and prompts.

  • Scan Tasks
  • Instant & Hold Abilities
  • Hold-Input Logic
  • UIExtension Feedback

CrimsonInventory

Layout-agnostic, fully replicated inventory and crafting.

  • Pluggable Topology
  • Runtime Constraints
  • Scoped Containers
  • Crafting
  • No RPCs to Write

CrimsonLoadingScreen

Game-instance-driven loading screens, fully automatic.

  • Condition-Based Show/Hide
  • Input Blocking
  • Weighted Tips
  • Character Preview

CrimsonNumberPop

Floating damage and number pops, pooled and replicated.

  • Pooled Widgets
  • Tag-Driven Styles
  • Multiplayer Replicated
  • Per-Player Filters

CrimsonSkillTree

Replicated, GAS-native skill trees with a two-graph editor.

  • Two-Graph Editor
  • Material Splines
  • Server-Authoritative
  • Atomic Respec & Loadouts

CrimsonTeams

Tag-based teams & factions with dynamic attitude.

  • Tag-Based Teams
  • Dynamic AI Re-Aggro
  • GAS Target Filtering
  • Team Colors
  • Multiplayer Dev Tools

Online

CrimsonOnlineSubsystem

Platform-agnostic online services behind one subsystem.

  • Identity & Sessions
  • Friends & Party
  • Achievements & Leaderboards
  • Store & Purchases
  • Cloud Save & Voice

Tools

CrimsonEditorUtilities

Editor-only tools, including a 10-tool MCP suite.

  • Save-Game Deleter
  • MCP Tooling
  • Asset Scaffolding
  • GameplayTag Browser