Collapse LauncherAn advanced launcher for HoYoverse Games

Control the games you play

Download Latest Release

Download Beta Release

Feature Docs

Installation Guide

Meet the Team

Multi-region Support

Manage multiple region (including cross-server region) games.

Game Installation Repair

Validate & repair all game assets without opening the game itself.

Sophon API Support

Use the new Sophon API on supported games for a faster and smaller game download and update experience.

Customization

Set custom background for each game region. Supports both still image and video formats.

Delta Patch

Benefit from an up to 10x smaller update package for certain region by utilizing HDiffZ folder comparison method.

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Code you can Trust

All published binaries go through several verification & validation steps by the core development team and are code-signed (courtesy of SignPath) before being published to users, guaranteeing a safe experience for all.

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I know, it's not a good one. But at least we made it lol
~ neon-nyan

GI Nahida Background Credit: Rafa on Pixiv

Why "Collapse"?

Collapse came from the Honkai Impact translation in Chinese and Japanese. The word came from [崩坏] or Bēng huài in Chinese and also [崩壊] or Houkai in Japanese, both meaning "Collapse" which is why we chose it as our launcher name with the added inspiration that this was supposed to be an alternative (enhanced) launcher for Honkai Impact 3rd in the first place.

Overview

Collapse contains advanced features for Honkai Impact 3rd that not only provide you with the ability to download and launch the game, but also some additional features that the Official Launcher doesn't have, including:

Caches Download (aka "Updating Settings" in-game).
Game Data Repair (with less bandwidth required than the Data Repair feature in-game).
Changing Game Settings (Graphics Settings & Audio Settings) without opening the game.
Multi-Region Game Download Support (Allows for downloading and launching different versions of the game).
Steam to Global version conversion (without re-downloading the whole game).
Global to SEA version (or vice versa) conversion.
Multi-session Download for faster Game Download/Installation.
Multi-thread Game Extraction for faster installation.
Delta-Patch Update Mechanism for smaller updates.
Ability to select Graphics API (DirectX 11 (FL: 10.1, 11.0 and 11.1) and DirectX 12 [May crash the game in newer stages]).

Not only that, this launcher also has some advanced features for Genshin Impact, including but not limited to:

Choosing your voice-line language during the first installation, so you don't have to download it inside the game.
Repair the game files including Game Caches, Cutscenes, Audio Pack & persistent files outside of the game.

UI Overview

Special Thanks

The team working on Collapse is really thankful for all of our users and contributors that have been keeping this project alive and well. We would also like to take the time to thank the following companies/organizations for providing their service for us. They help make the experience better for everyone involved.

JetBrains for providing their complete .NET suite and Qodana for our internal use!

Transifex for their intuitive translation platform!

SignPath Foundation for providing us free code signing!

Sentry for providing us with error collection platform!

Code Signing Policy

INFO

Free code signing provided by SignPath.io, certificate by SignPath Foundation

This program will only transfer user data to a user configured database server. Exception data will be sent to Sentry.io for error tracking purposes (users are able to disable the behavior in App Settings).
Read our full Privacy Policy.
Read our Third Party Notices for licenses used by third party libraries that we use.