Now obviously mods like are broken like UltraCoins or ones that add guns would invalidate any run, but do cosmetic mods such as Ultrakill Style Editor or AnyParry invalidate a run? 

Yes any mods will invalidate the run even just cosmetic ones.

Do mods invalidate runs?

zcorc

G95_7Seas

ULTRAKILL

1-4: Clair De Lune

4-2: God Damn The Sun

7-4: ...Like Antennas To Heaven

Neewbert

DarkPriest

ff_zx

Glitching_Fleet

1.02

1.03

1.04

1.05 Act 1

Prelude

Limbo

Lust

Gluttony

EA (9/13/20)

EA (10/13/20)

EA (11/3/20)

EA (12/19/20)

EA (4/13/21)

EA (6/23/21)

Greed

EA (8/13/21)

EA (10/28/21)

Main Exit

Secret Exit

P Exit

All Boxes

Any Boxes

78 Boxes

EA (2/16/22)

EA (8/16/22)

Act 2

Wrath

Heresy

EA (3/16/23)

EA (4/27/23)

Violence

EA (12/20/23)

EA (4/15/24)

Pre-Revamp

Post-Revamp

Encore

-- EA (2/24/25) --

Inbounds

Weaponless

Treachery

Fraud

Uncapped

Capped

Controller only

Standard Rules

Patch

Act Number Any%

Layer Number Any%

Layer Number P%

Act Number P%

Exit 0-2

Exit 1-1

Exit 2-3

Exit 3-1

Exit 4-2

4-S contingencies

Layer Number NoMo

Exit 5-1

Exit 6-2

Exit 0-2 NoMo

Exit 1-1 NoMo

Exit 2-3 NoMo

Exit 3-1 NoMo

Exit 4-2 NoMo

Exit 5-1 NoMo

Exit 6-2 NoMo

Exit 7-3 (broke)

Exit 7-3

Exit 7-3 NoMo

Revamp Split

Act Number NoMo

Extra Subcategory

Fps Cap

Input Restriction

SRC Series: Ultrakill All Secret Levels (Inbounds)

xwpw4y0l

- The top 3 session recording requirement has been removed.
- Now top 10 runs require Steam Overlay's in-game FPS counter to be enabled and visible in the recording, preferably with high contrast.
- If you have problems with the overlay disappearing, try running Steam as administrator.
- If using OB

Rules Change

Revamped Open Season

Revamped Update is here!

How to do oob consistenly in 0-E?

2-3 Secret Exit door not opening after the clip

Steam-Overlay FPS doesn't show on downpatched ultrakill versions

how do you area skip?

autosplitter not working :(

biba_dzibun

B.G.B.

Asunder

Jambott

queckquack

Dryzalar

eanra

debatable

Kano127

tootaroni

eqp8wpk5

cynkcaj

mercykill

DarkNova28

giorgi333

Westaxle

The_Black_Silence

10_days_till_xmas

Disestablishment

vendetta_

6lp4vpzw

Akashiya

Moldycheese

rewrkk

Kolta

vivyaann

F1restorm

pureya

_a31

marogaming

Nalost