If you want, I can:
While this link was once widely cited in Reddit and Steam community guides, it is now largely outdated.
Deprecated Link: The radiance.host domain is often inactive or flagged as unreliable by modern browsers. Users on Steam have noted that the site may no longer work as intended.
The Modern Choice (Scarab): Most players have moved to Scarab or Lumafly, which are updated mod installers designed to work with the latest version of Hollow Knight (1.5+).
Compatibility Issues: The original ModInstaller.exe often requires users to "downpatch" their game to an older version (like 1.4.3.2) to function correctly. Common Uses for the Installer
In the past, this installer was the go-to for adding features such as:
Custom Knight: Allows players to use custom skins like the "Pale Prince".
Gameplay Overhauls: Mods like Lightbringer, which changes the knight's melee attack to a ranged ability.
Randomizers: Tools that shuffle item locations, which are popular for high-replayability.
For a look at the Broken Vessel fight and strategies to defeat it: radiance.host mods modinstaller.exe
A success message appears: “Installation completed. Launch the game to enjoy your mods.” Some installers offer a button to launch the game directly.
Click Install. The executable will ping radiance.host to download the required files. You will see a progress bar showing:
On a 50 Mbps connection, a 2 GB mod pack should take 5–10 minutes.
| Action | How to Perform |
|--------|----------------|
| Check file hash | Compare SHA-256 hash of your modinstaller.exe against the one posted by the mod author on a trusted channel (e.g., Discord pinned message). |
| Scan with VirusTotal | Upload the .exe to virustotal.com. A clean result should show 0–1 engine detections (false positives are common for installers). |
| Examine network behavior | Use Windows Resource Monitor → Network tab. The .exe should only connect to radiance.host and perhaps GitHub (for updates). |
| Read the script | If you have technical skill, open modinstaller.exe with a tool like 7-Zip. Some installers are self-extracting archives; you can inspect the contained .bat or .ps1 scripts. |
| Run in a sandbox | Use Windows Sandbox (Pro/Enterprise) or Sandboxie to execute the installer first. Check what files it writes before running on your main OS. |
The executable is usually distributed by the mod author—not by radiance.host itself. So, you will typically find modinstaller.exe bundled inside a ZIP file you download from a forum post, a Discord channel, or a GitHub release. The exe references radiance.host as the backend download source.
Radiance gives you the storage and the CPU—you bring the compatibility.
The modinstaller.exe is just a delivery truck. Radiance.Host handles the uptime and DDoS protection. You handle mod order, API versions, and dependency trees.
When in doubt, delete the .exe and use Radiance’s native Steam Workshop or Mod Manager integrations. They are safer, faster, and require zero local installers.
Final Verdict
Skip sketchy modinstaller.exe files. Use them only as download helpers on your local PC, then upload the clean files to Radiance.Host via FTP.
Have a specific mod installer you are struggling with? Open a ticket with Radiance.Host Support—their team can tell you exactly which folders to drop those files into.
Ready to mod? [Login to your Radiance.Host Dashboard] or [Spin up a new server] today.
Disclaimer: Radiance.Host is not affiliated with third-party mod installers. Always scan executables with VirusTotal before running them.
radiance.host/mods/ModInstaller.exe was once the primary method for modding Hollow Knight on version 1.4, though it is now largely considered following the game's 1.5 update. Steam Community
While not a "blog post" in the traditional sense, the most interesting and comprehensive guide detailing its use is a Steam Community Guide (OUTDATED) Using The Mod Installer for Hollow Knight Steam Community Key Highlights from the Community Guide The Original "One-Click" Solution : Before modern managers like
, this installer was the gold standard for adding features like health bars, custom knight skins, and debug tools. Discord Roots
: The guide notes that the link was famously pinned in the #modding-discussion channel of the official Hollow Knight Discord. The "Run Anyway" Warning
: An interesting technical note is that Windows often flagged the If you want, I can:
as untrusted, requiring users to bypass SmartScreen warnings to "Run anyway". Version Compatibility
: The installer was built for the 1.4.3.2 version of the game. For it to work on modern Steam installs, users often had to "downpatch" their game using Steam's Beta properties. Steam Community Important Modern Context
If you are looking to mod Hollow Knight today, modern community resources recommend moving away from the radiance.host Newer Standards : The current community-recommended managers are , which support game version 1.5 and are easier to use. Safety Warning : Some older links to radiance.host
have been reported as slow or non-functional by users in recent years. Backup Requirement
: Almost all modding "blog posts" emphasize backing up your save files (found in AppData\LocalLow\Team Cherry
) before running any mod installer, as mods can sometimes contaminate save data. Steam Community For the most up-to-date information, you can check the Hollow Knight Modding Wiki official Discord (OUTDATED) Using The Mod Installer for Hollow Knight
The radiance.host/mods/ModInstaller.exe is an outdated, legacy tool primarily for Hollow Knight version 1.4.3.2 and often fails to function, with community resources recommending the use of Lumafly or Scarab for modern 1.5+ versions. While the old installer can be used by down-patching the game on Steam, it is considered obsolete compared to current, community-supported tools. For a current and supported installation, it is recommended to use Lumafly.
Guide :: (OUTDATED) Using The Mod Installer for Hollow Knight
Manual modding involves:
Modinstaller.exe collapses these five steps into one double-click. For mod packs that consist of dozens of interdependent files, an installer ensures proper load order and conflict resolution.
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