---
key: mechanic/boss-fight-atlas--boss-ricochet-projectile
type: mechanic
id: boss-fight-atlas--boss-ricochet-projectile
lang: en
title: Ricochet projectile
summary: A boundary collision changes a projectile's subsequent direction.
updatedAt: '2026-10-22'
status: active
url: >-
https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-ricochet-projectile/
jsonUrl: >-
https://gamemechanics.pro/api/v1/knowledge/en/mechanic/boss-fight-atlas--boss-ricochet-projectile.json
markdownUrl: >-
https://gamemechanics.pro/content/knowledge/en/mechanic/boss-fight-atlas--boss-ricochet-projectile.md
aliases: []
tags:
- Boss fights
- Projectiles
sourceIds:
- source-d76ab8061e35e4a9
- source-c73e6c4b98ec3c21
- source-bf349c4c36497926
- source-bd7f29d88bb94419
- source-8257284e3816dc3e
- source-73b3ffc2ba6c4e92
- source-945019fe5d82d809
- source-428086e3f830823e
sources:
- id: source-d76ab8061e35e4a9
title: 'Boss Fight Atlas: Ricochet projectile (RU)'
url: >-
https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/ricochet-projectile/
verifiedAt: null
- id: source-c73e6c4b98ec3c21
title: 'Boss Fight Atlas: Ricochet projectile (EN)'
url: >-
https://polyakovin.github.io/boss-fight-atlas/en/mechanics/ricochet-projectile/
verifiedAt: null
- id: source-bf349c4c36497926
title: Dung Defender · Hollow Knight
url: 'https://www.youtube.com/watch?v=xJzK50Cb24s&t=14s'
verifiedAt: null
- id: source-bd7f29d88bb94419
title: Wally Warbles · Cuphead
url: 'https://www.youtube.com/watch?v=Ol3-4Y0eS9M&t=58s'
verifiedAt: null
- id: source-8257284e3816dc3e
title: Ziva the Engineer · V Rising
url: 'https://www.youtube.com/watch?v=2FaqtlB36V8&t=24s'
verifiedAt: null
- id: source-73b3ffc2ba6c4e92
title: V Rising developers on Ziva the Engineer · PlayStation Blog
url: >-
https://blog.playstation.com/2024/06/03/v-rising-devs-deep-drive-into-boss-encounters-coming-to-ps5-june-11/
verifiedAt: null
- id: source-945019fe5d82d809
title: 'Boss Up: Boss Battle Design · GDC Vault'
url: 'https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design'
verifiedAt: null
- id: source-428086e3f830823e
title: Hollow Knight
url: 'https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s'
verifiedAt: null
relations: []
placements:
- catalogId: boss-fight-atlas
id: boss-ricochet-projectile
title: Boss fights
url: >-
https://gamemechanics.pro/en/mechanics/boss-fight-atlas/#boss-ricochet-projectile
categoryIds:
- catalog-part-2
supersededBy: []
attributes:
preview:
updatedAt: '2026-10-22'
title: Ricochet projectile
description: A boundary collision changes a projectile's subsequent direction.
image:
src: images/mechanics/boss-frame-xjzk50cb24s-40.webp
width: 854
height: 480
game: Hollow Knight
sourceUrl: 'https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s'
originalUrl: 'https://www.youtube.com/watch?v=xJzK50Cb24s'
sourceFrameSeconds: 40
credit: Team Cherry; gameplay capture by PC Indie Master Race
rights: >-
Game graphics © Team Cherry. Gameplay recording by PC Indie Master Race.
Visible source markings preserved. All rights reserved; excluded from
MIT and CC BY 4.0.
caption: Dung Defender’s balls bounce off surfaces
alt: Dung Defender’s balls bounce off surfaces
markers:
- x: 61
'y': 31
label: A ball remains dangerous after bouncing
tips:
- Keep bounce rules consistent and make surface contact visible.
examples:
- title: Hollow Knight
url: 'https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s'
endsAt: null
provenance: >-
Editorial reference index based on the 124 public Boss Fight Atlas mechanic
pages checked on 2026-10-20. Original concise RU/EN definitions by
gamemechanics.pro; source categories, game/boss associations and reference
URLs retained from the atlas. Linked materials retain their original rights;
references are upstream attributions, not independent verification.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/boss-fight-atlas
---
# Ricochet projectile
id: boss-fight-atlas--boss-ricochet-projectile
type: mechanic
key: mechanic/boss-fight-atlas--boss-ricochet-projectile
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-ricochet-projectile/
A boundary collision changes a projectile's subsequent direction.
## At a glance
[Hollow Knight](https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s) · Game graphics © Team Cherry. Gameplay recording by PC Indie Master Race. Visible source markings preserved. All rights reserved; excluded from MIT and CC BY 4.0.
[Source recording](https://www.youtube.com/watch?v=xJzK50Cb24s), 40 s
1. A ball remains dangerous after bouncing
- Keep bounce rules consistent and make surface contact visible.
- [Hollow Knight](https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s)
## How it works
A boundary collision changes a projectile's subsequent direction.
## Variants
### How the technique works
- A boundary collision changes a projectile's subsequent direction.
## Context and limits
A concise reference to all 124 Boss Fight Atlas mechanics across its 14 source sections. Each entry includes a definition, full RU/EN lesson links, game references and further reading retained from the source. Animations and detailed rules remain in the atlas.
## Connected materials
## Sources and provenance
Editorial reference index based on the 124 public Boss Fight Atlas mechanic pages checked on 2026-10-20. Original concise RU/EN definitions by gamemechanics.pro; source categories, game/boss associations and reference URLs retained from the atlas. Linked materials retain their original rights; references are upstream attributions, not independent verification.
- [Boss Fight Atlas: Ricochet projectile (RU)](https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/ricochet-projectile/) (id: source-d76ab8061e35e4a9)
- [Boss Fight Atlas: Ricochet projectile (EN)](https://polyakovin.github.io/boss-fight-atlas/en/mechanics/ricochet-projectile/) (id: source-c73e6c4b98ec3c21)
- [Dung Defender · Hollow Knight](https://www.youtube.com/watch?v=xJzK50Cb24s&t=14s) (id: source-bf349c4c36497926)
- [Wally Warbles · Cuphead](https://www.youtube.com/watch?v=Ol3-4Y0eS9M&t=58s) (id: source-bd7f29d88bb94419)
- [Ziva the Engineer · V Rising](https://www.youtube.com/watch?v=2FaqtlB36V8&t=24s) (id: source-8257284e3816dc3e)
- [V Rising developers on Ziva the Engineer · PlayStation Blog](https://blog.playstation.com/2024/06/03/v-rising-devs-deep-drive-into-boss-encounters-coming-to-ps5-june-11/) (id: source-73b3ffc2ba6c4e92)
- [Boss Up: Boss Battle Design · GDC Vault](https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design) (id: source-945019fe5d82d809)
- [Hollow Knight](https://www.youtube.com/watch?v=xJzK50Cb24s&t=40s) (id: source-428086e3f830823e)
CC-BY-4.0 · gamemechanics.pro contributors