---
title: "Releases and packs"
description: "The Kafka Simulator grows in numbered releases, each a themed pack of scenarios and free-play features. How a release decides what you see."
url: https://monedula.dev/flock/docs/kafka-simulator/concepts/releases-and-packs/
---
The simulator grows in numbered releases: 1.0, 1.1, 1.2 and on. Each release is a pack with a theme, starting with **Fundamentals** in 1.0, and adds scenarios on that theme, new free-play topologies or tools, or both.

## What a release decides

Everything the simulator offers carries the version that first ships it, and a build of the site includes everything up to its release:

- The playground's scenario library, the [scenario catalog](/flock/docs/kafka-simulator/reference/scenarios/) and the scenario counts on the [Kafka Simulator page](/kafka-simulator/) list only the scenarios the release ships.
- The **cluster type** picker offers only the topologies the release ships, and tools appear with the release that brings them. [Features by release](/flock/docs/kafka-simulator/reference/features/) lists both with their versions.
- A docs page about a feature is published with the release that ships it, and a passage about a later addition appears only from that release on.

A shared link that names a free-play topology this release does not include opens the **Single DC** sandbox instead.

## Which release you are using

The **⋯** menu in the playground's top bar shows the build as **build ·** followed by the version. Select it to open **Versions & roadmap**: the released versions, each with its theme and how many scenarios it added, then the upcoming ones. The [changelog](/kafka-simulator/changelog/) has the same list as a page. On a numbered build, the scenario library ends with a note, **More scenario packs coming soon**.

For a version that has not shipped, the [roadmap](/flock/docs/kafka-simulator/reference/roadmap/) shows only its theme; its scenarios and features arrive with it.