---
key: mechanic/deck-building--family-cooperation
type: mechanic
id: deck-building--family-cooperation
lang: en
title: Cooperation and team deck building
summary: The rules bind the development and use of decks of several participants.
updatedAt: '2026-10-22'
status: active
url: >-
  https://gamemechanics.pro/en/knowledge/mechanic/deck-building--family-cooperation/
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/deck-building--family-cooperation.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/deck-building--family-cooperation.md
aliases: []
tags:
  - Deck building
  - Systems and context
sourceIds:
  - source-3719d6c00eb94e21
  - source-d6f5bfb6bf2efea0
sources:
  - id: source-3719d6c00eb94e21
    title: Aeon's End · original rules
    url: 'https://media.lavkaigr.ru/uploads/9e-aeons-end-rulebook.pdf'
    verifiedAt: null
  - id: source-d6f5bfb6bf2efea0
    title: Across the Obelisk
    url: 'https://store.steampowered.com/app/1385380/'
    verifiedAt: null
relations: []
placements:
  - catalogId: deck-building
    id: family-cooperation
    title: Deck building
    url: 'https://gamemechanics.pro/en/mechanics/deck-building/#family-cooperation'
    categoryIds:
      - section-3
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Cooperation and team deck building
    description: The rules bind the development and use of decks of several participants.
    image:
      src: images/mechanics/broad-across-obelisk-06.webp
      width: 1440
      height: 810
      game: Across the Obelisk
      sourceUrl: 'https://store.steampowered.com/app/1385380/'
      originalUrl: >-
        https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/1385380/0725e5d26b68956ea39e1b4a41583a1f871bff84/ss_0725e5d26b68956ea39e1b4a41583a1f871bff84.1920x1080.jpg?t=1790078458
      credit: Dreamsite Games / Paradox Interactive / Paradox Arc
      rights: >-
        © Dreamsite Games / Paradox Interactive / Paradox Arc. All rights
        reserved.
      caption: Each hero receives a separate card choice after combat
      alt: Each hero receives a separate card choice after combat
      markers:
        - x: 36
          'y': 54
          label: Rewards are organised by heroes with separate decks
    tips:
      - Let participants coordinate deck development before the next battle.
    examples:
      - title: Across the Obelisk
        url: 'https://store.steampowered.com/app/1385380/'
endsAt: null
provenance: >-
  Original editorial design catalog consolidated from project discussions on
  2026-10-20. Complete discussion item lists and contextual limitations are
  preserved; linked primary sources support specific techniques, not the entire
  classification. English translation was prepared with machine assistance and
  editorial review.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/deck-building
---
# Cooperation and team deck building

id: deck-building--family-cooperation
type: mechanic
key: mechanic/deck-building--family-cooperation
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/deck-building--family-cooperation/

The rules bind the development and use of decks of several participants.

## At a glance

![Each hero receives a separate card choice after combat](https://gamemechanics.pro/images/mechanics/broad-across-obelisk-06.webp)

[Across the Obelisk](https://store.steampowered.com/app/1385380/) · © Dreamsite Games / Paradox Interactive / Paradox Arc. All rights reserved.

1. Rewards are organised by heroes with separate decks

- Let participants coordinate deck development before the next battle.

- [Across the Obelisk](https://store.steampowered.com/app/1385380/)

## How it works

The rules bind the development and use of decks of several participants.

## Variants

### Variants and applications

<a id="family-cooperation-variants"></a>

- Ally gain. Rule: The player sends a reward or purchase to an ally's deck. <a id="variant-cooperation-01"></a>
- Ally deck service. Rule: One participant removes, restores or enhances the cards of another according to an explicit rule. <a id="variant-cooperation-02"></a>
- Hand transfer. Rule: Participants pass available cards to collect the desired combination from a suitable player. <a id="variant-cooperation-03"></a>
- Ally support. Rule: An effect provides another player with energy, additional cards, actions, or another resource for their deck. <a id="variant-cooperation-04"></a>
- Cross-player combo. Rule: Cards of different participants check common tags, statuses, order of actions or jointly prepared conditions. <a id="variant-cooperation-05"></a>
- Role incentives. Rule: Rules reward specialization of participants or require different deck functions to solve a common problem. <a id="variant-cooperation-06"></a>
- Variable turn order. Rule: The order of actions of participants and enemies is determined by a separate deck or other mechanism, changing the value of preparation and support. <a id="variant-cooperation-07"></a>

## Context and limits

Design taxonomy of basic rules and options, including card operations and external systems. The number of entries is not a generally accepted classification of independent mechanics.

## Connected materials


## Sources and provenance

Original editorial design catalog consolidated from project discussions on 2026-10-20. Complete discussion item lists and contextual limitations are preserved; linked primary sources support specific techniques, not the entire classification. English translation was prepared with machine assistance and editorial review.

- [Aeon's End · original rules](https://media.lavkaigr.ru/uploads/9e-aeons-end-rulebook.pdf) (id: source-3719d6c00eb94e21)
- [Across the Obelisk](https://store.steampowered.com/app/1385380/) (id: source-d6f5bfb6bf2efea0)

CC-BY-4.0 · gamemechanics.pro contributors