---
key: mechanic/engagement-retention--family-07
type: mechanic
id: engagement-retention--family-07
lang: en
title: Loot and collecting
summary: >-
  Loot fills a set of items and creates long-term goals. Rarity and an
  incomplete collection affect the value of the next find.
updatedAt: '2026-10-22'
status: active
url: >-
  https://gamemechanics.pro/en/knowledge/mechanic/engagement-retention--family-07/
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/engagement-retention--family-07.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/engagement-retention--family-07.md
aliases: []
tags:
  - 'Engagement, retention and addictive patterns'
  - Mechanics catalog
sourceIds:
  - source-43a59b91bdde2acb
sources:
  - id: source-43a59b91bdde2acb
    title: Vampire Survivors
    url: 'https://store.steampowered.com/app/1794680/'
    verifiedAt: null
relations: []
placements:
  - catalogId: engagement-retention
    id: family-07
    title: 'Engagement, retention and addictive patterns'
    url: 'https://gamemechanics.pro/en/mechanics/engagement-retention/#family-07'
    categoryIds:
      - section-1
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Loot and collecting
    description: >-
      Loot fills a set of items and creates long-term goals. Rarity and an
      incomplete collection affect the value of the next find.
    image:
      src: images/mechanics/rpg-vampire-survivors-05.webp
      width: 1280
      height: 800
      game: Vampire Survivors
      sourceUrl: 'https://store.steampowered.com/app/1794680/'
      originalUrl: >-
        https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/1794680/ss_bea7831ae00c044d9cd31c3f8e0fee766b4fe1c6.1920x1080.jpg?t=1787911678
      credit: poncle / poncle
      rights: © poncle / poncle. All rights reserved.
      caption: The collection contains 124 of 127 entries
      alt: The collection contains 124 of 127 entries
      markers:
        - x: 53
          'y': 15
          label: The counter and empty slots show the remaining collection goal
    tips:
      - Show acquisition methods and collection limits.
    examples:
      - title: Vampire Survivors
        url: 'https://store.steampowered.com/app/1794680/'
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/engagement-retention
---
# Loot and collecting

id: engagement-retention--family-07
type: mechanic
key: mechanic/engagement-retention--family-07
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/engagement-retention--family-07/

Loot fills a set of items and creates long-term goals. Rarity and an incomplete collection affect the value of the next find.

## At a glance

![The collection contains 124 of 127 entries](https://gamemechanics.pro/images/mechanics/rpg-vampire-survivors-05.webp)

[Vampire Survivors](https://store.steampowered.com/app/1794680/) · © poncle / poncle. All rights reserved.

1. The counter and empty slots show the remaining collection goal

- Show acquisition methods and collection limits.

- [Vampire Survivors](https://store.steampowered.com/app/1794680/)

## How it works

Obtaining loot and completing the collection provides long-term goals and changes the value of individual finds.

## Variants

### Variants and applications

<a id="family-07-variants"></a>

- Item rarities: a clear hierarchy makes getting a rarer item a goal <a id="variant-engagement-retention-07-01"></a>
- An unfinished collection: empty spaces remind of missing items <a id="variant-engagement-retention-07-02"></a>
- Full Set Bonus: Individual finds receive additional value in the set <a id="variant-engagement-retention-07-03"></a>
- Collecting fragments: every small find brings you closer to obtaining the whole object <a id="variant-engagement-retention-07-04"></a>
- Leveling through duplicates: getting an item again remains useful <a id="variant-engagement-retention-07-05"></a>
- Random characteristics of items: even a familiar item can drop in the best variant <a id="variant-engagement-retention-07-06"></a>
- Finding synergy for a build: the next item is able to complete the desired combination <a id="variant-engagement-retention-07-07"></a>
- Alternate versions: special colors, shapes, signatures and variants expand the collection without changing the core mechanics <a id="variant-engagement-retention-07-08"></a>

## Context and limits

A map of 160 techniques for analyzing interest, returns, costs and pressure on the player. Involvement in itself does not mean dependence; the presence of separate mechanics does not determine the diagnosis or prove causation. This is the author's classification for critical analysis of design, and not a scientifically established list of the causes of gaming disorder. Assess context, audience, voluntariness of participation, and opportunity to stop.

## 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.

- [Vampire Survivors](https://store.steampowered.com/app/1794680/) (id: source-43a59b91bdde2acb)

CC-BY-4.0 · gamemechanics.pro contributors