Designing Scenarios with Runtime Spawner

Designer overview of the package

Runtime Spawner isn’t just a technical tool - it’s a framework for shaping gameplay pacing, pressure, and surprise.

In 2.0, scenario design is built by combining:

• Core spawning systems

• Director-driven pacing

• Optional addon behaviors

• Optional special encounter rules

This lets you create scenarios that start calm, escalate naturally, and deliver memorable spikes of tension.

1. The Big Picture

At runtime, four layers work together:

Runtime Spawner Core

The execution engine that handles:

• active spawn tracking

• population limits

• cooldowns and retries

• placement and validation

• object factory execution

Spawn Director

Part of core, the Spawn Director controls the intensity ladder for your scenario:

• scaling pressure over time or progression steps

• adjusting pacing and spawn limits

• defining the overall flow of challenge

Addons

Optional behavior packages that define how scenarios are structured:

• Global Spawner

• Local Area Spawner

• Waves

• Spawnpoints

Special Encounters Addon

An optional addon package for conditional dramatic spawns:

• flankers

• mini-bosses

• reactive enemies

• surprise pressure spikes

2. Baseline Spawning (The Foundation)

Your baseline scenario flow usually comes from a combination of the core spawner plus one or more addons.

Common patterns:

Global Spawner

Maintains a persistent world population.

Use for:

• ambient enemies

• roaming threats

• open-world population

Local Area Spawner

Activates based on player presence in a region.

Use for:

• encounter zones

• proximity-driven combat spaces

• room or arena activation

Waves

Provides structured bursts of enemies over time.

Use for:

• survival encounters

• defense missions

• escalating combat beats

Spawnpoints

Provides explicit authored spawn locations.

Use for:

• ambushes

• controlled entrances

• precise enemy placement

Think of this layer as:

“What is the default structure of the encounter?”

3. Spawn Director (The Intensity Ladder)

The Spawn Director remains part of the core system and controls the larger pacing arc.

It manages scenario intensity through steps or phases, such as:

• low pressure exploration

• rising combat intensity

• sustained survival pressure

• final peak or climax

A Director step can influence things like:

• alive caps

• spawn pacing

• wave cadence

• overall scenario pressure

Example progression:

• Step 0 - light ambient danger, scattered enemies

• Step 1–2 - more regular pressure, modest groups

• Step 3–4 - frequent conflict, higher sustained presence

• Step 5+ - near-constant pressure, survival feel

Use the Director for:

• long-form pacing

• escalation curves

• recovery windows between peaks

4. Special Encounters (The Spice)

The Special Encounters system is now a separate addon package.

This system is used for conditional, dramatic, or reactive spawns that sit on top of your baseline flow.

Examples:

• a flanking group that appears when pressure is high

• a sniper unit triggered when player health is low

• a mini-boss introduced after players survive long enough

• reinforcement enemies that appear only during late intensity steps

Each special encounter can define:

• what to spawn

• when it is valid

• placement rules

• caps and cooldowns

• optional telemetry or step gating

Think of Specials as:

“The moments that break the rhythm and make the scenario memorable.”

5. Putting It Together

A typical 2.0 scenario might look like this:

Early Calm

• Global Spawner provides light ambient enemies

• Director is on a low-intensity step

Rising Action

• Player enters a Local Area

• Waves begin spawning in controlled bursts

• Director advances to a higher step

Surprise Spike

• Special Encounter addon triggers a flanking group or elite enemy

• Spawnpoints are used for authored placement

Sustained Pressure

• Wave pacing increases

• Alive caps rise

• More specials become valid

Climax

• Peak Director step

• Fast wave cadence

• one or more special encounter rules active

Release

• Director steps back down, or the scenario ends

• Local Area deactivates, or waves stop

6. Design Guidelines

Use Core + Director for Macro Pacing

• Core handles execution

• Director shapes long-term intensity

Use Addons for Scenario Structure

• Global for persistent population

• Local Area for space-based activation

• Waves for timed pressure

• Spawnpoints for authored placement

Use Specials for Drama

• Save them for spikes, twists, and memorable beats

• Avoid overusing them or they stop feeling special

Mix Procedural and Authored Placement

• Procedural keeps encounters fresh

• Authored placement keeps them intentional

Keep Caps Conservative

• Strong pacing usually feels better than raw quantity

Key Mental Model

Core

• Executes and tracks spawns

Director

• Controls the pacing ladder

Addons

• Define the scenario structure

Special Encounters

• Add dramatic exceptions and surprises