Crimson Plugin Suite — free & premium plugins for Unreal Engine 5
Stop rebuilding the same systems. Ship your game.
A modular suite of production-ready UE5 plugins — saves, UI, input, abilities, inventory, and more. Start with the free foundation today; add premium systems only when your game needs them.
Free on Fab · UE 5.x · Blueprint & C++ · Multiplayer-ready
Crimson Plugin Suite
Production-ready gameplay systems that snap together on one free foundation.
Start free, scale up
Seven production plugins — $150+ of tooling by marketplace prices — free. Everything shares one contract layer, so it all snaps together.
CrimsonSaveSystem
Fragment-based saving — each system owns its own data.
- Independent Fragments
- No Cross-Plugin Coupling
- Blueprint-Ready
CrimsonCommon
The shared contract layer every Crimson plugin builds on.
- Replicated Tag Stacks
- Message Bus
- Ability-Set Bridge
- Modular Base Classes
CrimsonUI
Game-agnostic CommonUI foundation for menus and HUDs.
- Layer & Dialog System
- Activatable Widgets
- MVVM Base Classes
- World-Space Indicators
CrimsonInput
Tag-driven Enhanced Input with GAS ability binding.
- Ability Input Binding
- Per-Player Rebinding
- Settings Modifiers
- CommonUI Actions
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
CrimsonEditorUtilities
Editor-only tools, including a 10-tool MCP suite.
- Save-Game Deleter
- MCP Tooling
- Asset Scaffolding
- GameplayTag Browser
Scale up with premium systems
Foundation
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
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
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
CrimsonCore — a reference game wiring the whole suite together — is free for Discord members. Get it on Discord
Browse the full documentationStart free. Upgrade when your game does.
Grab the free foundation from Fab, drop it into your project, and join the Discord if you get stuck — we ship fixes fast.