---
key: mechanic/boss-fight-atlas--boss-forced-inertia
type: mechanic
id: boss-fight-atlas--boss-forced-inertia
lang: en
title: Forced inertia
summary: Retained momentum limits immediate changes in movement.
updatedAt: '2026-10-22'
status: active
url: >-
https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-forced-inertia/
jsonUrl: >-
https://gamemechanics.pro/api/v1/knowledge/en/mechanic/boss-fight-atlas--boss-forced-inertia.json
markdownUrl: >-
https://gamemechanics.pro/content/knowledge/en/mechanic/boss-fight-atlas--boss-forced-inertia.md
aliases: []
tags:
- Boss fights
- 'Space, movement, and perception'
sourceIds:
- source-42e96465955e68b3
- source-3ac94a63c5d97caf
- source-7d0a9c7738a8dfd9
- source-07d23e68a252430a
- source-8f9909e749b97cc9
- source-945019fe5d82d809
- source-28ca554e24c02b1c
- source-f3c0f727c418687c
- source-624baeea4749cf9c
- source-ebd11748f5bf1645
sources:
- id: source-42e96465955e68b3
title: 'Boss Fight Atlas: Forced inertia (RU)'
url: 'https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/forced-inertia/'
verifiedAt: null
- id: source-3ac94a63c5d97caf
title: 'Boss Fight Atlas: Forced inertia (EN)'
url: 'https://polyakovin.github.io/boss-fight-atlas/en/mechanics/forced-inertia/'
verifiedAt: null
- id: source-7d0a9c7738a8dfd9
title: Ice Man · Mega Man
url: 'https://www.youtube.com/watch?v=lTRIaXXPRfs&t=1s'
verifiedAt: null
- id: source-07d23e68a252430a
title: 'Demon Itsy · Croc: Legend of the Gobbos'
url: 'https://www.youtube.com/watch?v=It3Yjfd_Ojw&t=1s'
verifiedAt: null
- id: source-8f9909e749b97cc9
title: Shiva · Final Fantasy XIV
url: 'https://www.youtube.com/watch?v=qK9YaAE-oRk&t=380s'
verifiedAt: null
- id: source-945019fe5d82d809
title: GDC · Itay Keren — Boss Battle Design Fundamentals and Retrospective
url: 'https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design'
verifiedAt: null
- id: source-28ca554e24c02b1c
title: Final Fantasy XIV Online Wiki — The Akh Afah Amphitheatre (Extreme)
url: >-
https://ffxiv.consolegameswiki.com/wiki/The_Akh_Afah_Amphitheatre_(Extreme)
verifiedAt: null
- id: source-f3c0f727c418687c
title: StrategyWiki — Mega Man / Ice Man
url: 'https://strategywiki.org/wiki/Mega_Man/Ice_Man'
verifiedAt: null
- id: source-624baeea4749cf9c
title: StrategyWiki — Croc / Demon Itsy's Ice Palace
url: >-
https://strategywiki.org/wiki/Croc:_Legend_of_the_Gobbos/Demon_Itsy%27s_Ice_Palace
verifiedAt: null
- id: source-ebd11748f5bf1645
title: Mega Man (Legacy Collection)
url: 'https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s'
verifiedAt: null
relations: []
placements:
- catalogId: boss-fight-atlas
id: boss-forced-inertia
title: Boss fights
url: >-
https://gamemechanics.pro/en/mechanics/boss-fight-atlas/#boss-forced-inertia
categoryIds:
- catalog-part-10
supersededBy: []
attributes:
preview:
updatedAt: '2026-10-22'
title: Forced inertia
description: Retained momentum limits immediate changes in movement.
image:
src: images/mechanics/boss-final-ltriaxxprfs-17.webp
width: 640
height: 360
game: Mega Man (Legacy Collection)
sourceUrl: 'https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s'
originalUrl: 'https://www.youtube.com/watch?v=lTRIaXXPRfs'
sourceFrameSeconds: 17
credit: Capcom; gameplay capture by Boss Fight Database
rights: >-
Game graphics © Capcom. Gameplay recording by Boss Fight Database.
Original visible source markings retained. All rights reserved; excluded
from portal MIT and CC BY 4.0.
caption: 'Mega Man: the icy floor in Ice Man’s room changes stopping behavior'
alt: 'Mega Man: the icy floor in Ice Man’s room changes stopping behavior'
markers:
- x: 55
'y': 90
label: The slippery floor requires accounting for motion after input ends
tips:
- >-
Let players feel the inertia before a dangerous attack and allow braking
time.
examples:
- title: Mega Man (Legacy Collection)
url: 'https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s'
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
---
# Forced inertia
id: boss-fight-atlas--boss-forced-inertia
type: mechanic
key: mechanic/boss-fight-atlas--boss-forced-inertia
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-forced-inertia/
Retained momentum limits immediate changes in movement.
## At a glance
[Mega Man (Legacy Collection)](https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s) · Game graphics © Capcom. Gameplay recording by Boss Fight Database. Original visible source markings retained. All rights reserved; excluded from portal MIT and CC BY 4.0.
[Source recording](https://www.youtube.com/watch?v=lTRIaXXPRfs), 17 s
1. The slippery floor requires accounting for motion after input ends
- Let players feel the inertia before a dangerous attack and allow braking time.
- [Mega Man (Legacy Collection)](https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s)
## How it works
Retained momentum limits immediate changes in movement.
## Variants
### How the technique works
- Retained momentum limits immediate changes in movement.
## 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: Forced inertia (RU)](https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/forced-inertia/) (id: source-42e96465955e68b3)
- [Boss Fight Atlas: Forced inertia (EN)](https://polyakovin.github.io/boss-fight-atlas/en/mechanics/forced-inertia/) (id: source-3ac94a63c5d97caf)
- [Ice Man · Mega Man](https://www.youtube.com/watch?v=lTRIaXXPRfs&t=1s) (id: source-7d0a9c7738a8dfd9)
- [Demon Itsy · Croc: Legend of the Gobbos](https://www.youtube.com/watch?v=It3Yjfd_Ojw&t=1s) (id: source-07d23e68a252430a)
- [Shiva · Final Fantasy XIV](https://www.youtube.com/watch?v=qK9YaAE-oRk&t=380s) (id: source-8f9909e749b97cc9)
- [GDC · Itay Keren — Boss Battle Design Fundamentals and Retrospective](https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design) (id: source-945019fe5d82d809)
- [Final Fantasy XIV Online Wiki — The Akh Afah Amphitheatre (Extreme)](https://ffxiv.consolegameswiki.com/wiki/The_Akh_Afah_Amphitheatre_(Extreme)) (id: source-28ca554e24c02b1c)
- [StrategyWiki — Mega Man / Ice Man](https://strategywiki.org/wiki/Mega_Man/Ice_Man) (id: source-f3c0f727c418687c)
- [StrategyWiki — Croc / Demon Itsy's Ice Palace](https://strategywiki.org/wiki/Croc:_Legend_of_the_Gobbos/Demon_Itsy%27s_Ice_Palace) (id: source-624baeea4749cf9c)
- [Mega Man (Legacy Collection)](https://www.youtube.com/watch?v=lTRIaXXPRfs&t=17s) (id: source-ebd11748f5bf1645)
CC-BY-4.0 · gamemechanics.pro contributors