Spire Systems Interaction Kit is a reusable Blueprint-only interaction foundation for Unreal Engine 5.8.

Build interactable gameplay with reusable scanning, targeting, interaction prompts, instant interaction, and hold-to-interact behavior through a component-based setup centered on BPC_InteractionScanner and BPI_Interactable.

The scanner component handles current target tracking, valid interactable detection, prompt visibility, prompt text, interaction input, hold timing, hold cancellation, and interaction execution. Interactable actors can provide their own interaction text, require hold interaction, and define their own hold duration. A global hold-to-interact override is also available.

Included interaction examples:

• Door

• Pickup

• Button

• Lever

• Light Switch

• Pressure Plate

• Timed Button

• Rotating Gate

• Elevator Button

• Toggle Barrier

The included actors demonstrate how to build on the reusable interaction foundation. They are examples rather than complete standalone inventory, elevator, puzzle, lighting, or other gameplay frameworks.

Also included:

• Reusable BPC_InteractionScanner component

• BPI_Interactable Blueprint Interface

• Automatic Press E and Hold E prompt handling

• Configurable interaction text

• Configurable scan distance

• Per-interactable hold settings

• Global hold interaction override

• Enhanced Input demo controls

• House demonstration map

• In-engine buyer documentation

• Blueprint graph-level implementation guidance

Technical:

• Blueprint only

• Unreal Engine 5.8

• No C++

• Networking and replication are not implemented

• No mannequin dependency

• No Starter Content dependency

• No external asset dependency

Interaction Kit is designed as a standalone reusable interaction foundation. It does not provide a complete inventory, quest, save/load, combat, ability, health, status effect, AI, networking, character, or UI framework.