---
key: mechanic/puzzle-transformations--t168
type: mechanic
id: puzzle-transformations--t168
lang: en
title: 'Merging, combining and growing objects'
summary: >-
  Compatible objects combine into a new state, requiring players to plan both
  chain growth and available space.
updatedAt: '2026-10-22'
status: active
url: 'https://gamemechanics.pro/en/knowledge/mechanic/puzzle-transformations--t168/'
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/puzzle-transformations--t168.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/puzzle-transformations--t168.md
aliases:
  - Merging and evolving objects
tags:
  - Puzzles and reasoning challenges
  - Mechanics and variants
sourceIds:
  - source-eceba0e40b661634
  - source-19446e425a9a00b3
  - source-5b737ba9e639da22
sources:
  - id: source-eceba0e40b661634
    title: 'PuzzleScript: Rules'
    url: 'https://www.puzzlescript.net/Documentation/rules.html'
    verifiedAt: null
  - id: source-19446e425a9a00b3
    title: '2048'
    url: 'https://github.com/gabrielecirulli/2048'
    verifiedAt: null
  - id: source-5b737ba9e639da22
    title: '2048'
    url: 'https://play2048.co/'
    verifiedAt: null
relations: []
placements:
  - catalogId: puzzle-transformations
    id: t168
    title: Puzzles and reasoning challenges
    url: 'https://gamemechanics.pro/en/mechanics/puzzle-transformations/#t168'
    categoryIds:
      - mechanics
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Merging and evolving objects
    description: >-
      Compatible objects combine into a new state, requiring players to plan
      both chain growth and available space.
    image:
      src: images/mechanics/systems-2048-original.webp
      width: 500
      height: 694
      game: '2048'
      sourceUrl: 'https://github.com/gabrielecirulli/2048'
      originalUrl: 'https://github.com/gabrielecirulli/2048/blob/master/index.html'
      credit: >-
        Gabriele Cirulli; screenshot of the unmodified original game, captured
        2026-10-22
      rights: >-
        © 2014 Gabriele Cirulli, MIT License. Screenshot converted to WebP on
        2026-10-22. License copy: images/mechanics/2048-license.txt.
      caption: The original 2048 after a sequence of normal moves
      alt: The original 2048 after a sequence of normal moves
      markers:
        - x: 86
          'y': 55
          label: Adjacent twos can be merged into a four
    tips:
      - >-
        Distinguish the matching condition from the rule for creating the new
        object.
    examples:
      - title: '2048'
        url: 'https://play2048.co/'
      - title: Original source
        url: 'https://github.com/gabrielecirulli/2048'
endsAt: null
provenance: >-
  Original bilingual editorial overviews authored for gamemechanics.pro on
  2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design
  examples; prototype checks describe work to perform, not completed playtests.
  Primary sources support the stated techniques and implementation context, not
  every proposed variant.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/puzzle-transformations
---
# Merging, combining and growing objects

id: puzzle-transformations--t168
type: mechanic
key: mechanic/puzzle-transformations--t168
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/puzzle-transformations--t168/

Compatible objects combine into a new state, requiring players to plan both chain growth and available space.

## At a glance

![The original 2048 after a sequence of normal moves](https://gamemechanics.pro/images/mechanics/systems-2048-original.webp)

[2048](https://github.com/gabrielecirulli/2048) · © 2014 Gabriele Cirulli, MIT License. Screenshot converted to WebP on 2026-10-22. License copy: images/mechanics/2048-license.txt.

1. Adjacent twos can be merged into a four

- Distinguish the matching condition from the rule for creating the new object.

- [2048](https://play2048.co/)
- [Original source](https://github.com/gabrielecirulli/2048)

## How it works

Compatible objects combine into a new state, requiring players to plan both chain growth and available space.

## Variants

### Mechanic variants

<a id="t168-variants"></a>

- A matching pair produces the next object rank. <a id="t168-v1"></a>
- Triples improve yield but require preparation. <a id="t168-v2"></a>
- Chain reactions merge outputs without a pause. <a id="t168-v3"></a>
- Generators consume resources and occupy space. <a id="t168-v4"></a>

## Design example

Three saplings produce a tree, but neighboring cells must be cleared before it can yield fruit.

Prototype check: Test a full board: players should see irreversible merges in advance and understand how to clear space.

## Context and limits

Combining objects changes the puzzle board: one move’s output becomes the material for another decision. Each overview separates player actions, state changes and alternative rules. Examples are hypothetical design scenarios, not claims about a named game. A prototype check states an observable question for the next iteration. Existing detailed references remain separately linked from the direction map.

## Connected materials


## Sources and provenance

Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant.

- [PuzzleScript: Rules](https://www.puzzlescript.net/Documentation/rules.html) (id: source-eceba0e40b661634)
- [2048](https://github.com/gabrielecirulli/2048) (id: source-19446e425a9a00b3)
- [2048](https://play2048.co/) (id: source-5b737ba9e639da22)

CC-BY-4.0 · gamemechanics.pro contributors