Without long explanation I'll be giving some information on what files are you able to replace.

• Textures2D/Textures/User Interface are easy to replace with built in edit image plugin of the tool itself.
  
• Audios can be replace using text dump containing information on where the audio is being stored.

If you download a particular mod that replace textures on the user interface you can quick copy paste .assets file to "ULTRAKILL_DATA". Others also released a mod containing the source file of it instead. Now this can be hard if the source of the image is not the same as name of the image inside .asset file. I'd advice to ask the creators which texture (name of the file inside asset package) that will replace the texture and what assetpackage does it belong to.

For example you just download Devil May Cry Stylish Rank and you choose to go with replace image method.

1.Download the mod that contains image file in .png format



2.Open Unity Asset Bundle Extractor and click the program



















3.Click File > Open > "ULTRAKILL/ULTRAKILL_DATA/sharedassets1.assets". Search for asset names that contain rank A/B/C/D/S/SS/SSS/U



4.Select respective asset name and click Plugins > Edit then go to texture section and press load. Here you can replace all Texture2D asset of stylish rank.







5.Click File > Apply and Save all and be sure to save the modified asset and vanilla asset in seperate folder










6.Copy modified asset to ULTRAKILL/ULTRAKILL_DATA/and enjoy the mod

Replacing the audio has similiar step to previous one but instead of replacing literal audio, you will replace a file that contains information on where the source of audio from.

For example you just download a music mod that replace cybergrind soundtrack but it only contains .resource and text files. Well here are the step how to replace them.

1.Download the mod that contains the file





2.Open Unity Asset Bundle Extractor and click the program






















3.Click File > Open > "ULTRAKILL/ULTRAKILL_DATA/sharedassets2.assets". Search for asset names that has "The Cyber Grind _ Final Version 1 ...."



4.Select respective asset name and click Import Dump and click the text filename that correspond with the asset name.







5.Click File > Apply and Save all and be sure to save the modified asset and vanilla asset in seperate folder










6.Copy modified asset and .resource to ULTRAKILL/ULTRAKILL_DATA/and enjoy the mod

And you're done, that's basically how to replace certain file using Unity Asset Bundle Extractor (UABE). When you try to replace audio you might cause the game to crashed, honestly I have no idea how that could happened even if you follow the steps correctly but to solve this try to replace the dump text in another vanilla assetpackage.


Q: I've seen some people modifying rank UI on campaign, how do I replace them to campaign?
A: Follow Replacing Through Dump Text Method and you need to open common file inside streamingassets folder. Then follow the steps carefully.

Q: Do I need to replace .resource file?
A: No you don't need to replace .resource file.