How To Get Mods On PEAK: Complete PC Modding & Setup Guide

Installing mods on PEAK requires deploying a compatible C# mod loader framework—such as BepInEx 5—directly into the game root folder or utilizing an automated package manager like Thunderstore or r2modman. Modifying PEAK allows players to overhaul graphics, add custom gameplay mechanics, tweak physics, and inject quality-of-life interface scripts by routing compiled .dll plugins through Unity assembly injectors. Following proper file placement procedures and dependency management guarantees a crash-free installation and smooth multiplayer performance.

Prerequisite Setup & System File Readiness

Before modifying game files or deploying community scripts, your PC environment and game installation must meet strict prerequisites. Modifying PEAK alters how the Unity engine executes assembly code at boot, making clean file verification and structured folder management essential.

Essential Equipment & File Checklist

• Primary Mod Loader: BepInEx 5.4.x (64-bit x64 Mono build) or Thunderstore Mod Manager application.
• Archival Software: 7-Zip, WinRAR, or Windows File Explorer for compressed .zip and .tar.gz archive handling.
• Access Permissions: Administrative Windows privileges on your target storage drive to write and execute custom compiled dynamic-link library files.
• Prerequisite Software: Microsoft .NET Framework 4.8 or newer runtime installation.
• Estimated Execution Time: 10 to 15 minutes for initial manual setup; 3 to 5 minutes via automated mod managers.
• Baseline Game Version: Official, un-modded Steam build of PEAK updated to the latest live patch.

Warning: Never attempt to install mods on an active, unbacked-up save directory. Create a local copy of your game save files located in your Windows User AppData LocalLow folder before injecting custom assembly files.

Step-by-Step PEAK Mod Installation Guide

Step 1: Locate and Prepare the PEAK Root Installation Directory

Modding loaders need direct system access to the primary executable file for PEAK. You must locate the exact folder path where Steam stores your game binary files.

1. Launch your Steam client and navigate to your personal Library.
2. Right-click on PEAK in your game list, hover over Manage, and select Browse local files.
3. A Windows File Explorer window will open showing the root game folder. The directory path usually resembles C:\Program Files (x86)\Steam\steamapps\common\PEAK.
4. Confirm that PEAK.exe and the accompanying PEAK_Data folder are present in this directory. Keep this File Explorer window open for subsequent steps.

Step 2: Install the BepInEx Mod Loader Framework

PEAK operates on the Unity game engine, which uses compiled C# code assemblies. The standard BepInEx framework hooks into the engine start sequence using a specialized loader file, enabling custom plugins to run alongside native scripts.

1. Download the latest x64 release build of BepInEx 5 from an established community mod hosting platform or GitHub release page.
2. Open the downloaded BepInEx .zip archive using your preferred extraction utility.
3. Select all contents inside the zip file, including the BepInEx folder, winhttp.dll, doorstop_config.ini, and any accompanying system manifests.
4. Drag and drop these files directly into the PEAK root directory where PEAK.exe resides.
5. Launch PEAK once through Steam to initialize the loader. The BepInEx framework will automatically generate system configuration files, logging outputs, and subdirectories.
6. Exit the game completely once you reach the primary main menu screen.

Pro-Tip: Check your PEAK root directory after closing the game. If BepInEx initialized successfully, you will notice a newly generated folder structure inside PEAK/BepInEx/ containing folders named config, plugins, patchers, and LogOutput.log.

Step 3: Download Compatible PEAK Modifications

Mods for PEAK generally arrive as compiled .dll plugin files, custom asset bundles, or script modification packages. Always verify that downloaded mods state explicit compatibility with your current game build and BepInEx version.

1. Navigate to a trusted mod repository such as Thunderstore or Nexus Mods.
2. Search for desired PEAK modifications, filtering by total downloads, community endorsements, or recent updates.
3. Inspect the mod description page to identify any mandatory dependency requirements (such as HookGenPatcher, MMHOOK, or specialized API utility libraries).
4. Download the target mod package directly to your local computer's Downloads folder.
5. Extract the downloaded zip file into an empty temporary folder on your desktop.

Step 4: Deploy Mod Files into the Plugins Folder Structure

To execute correctly, mod script files must reside within the exact subfolder monitored by the BepInEx loader during boot execution.

1. Re-open your PEAK root directory and navigate down into the BepInEx folder, then double-click the plugins directory (PEAK/BepInEx/plugins).
2. Open your extracted mod folder in a separate File Explorer window.
3. Locate the primary compiled script files ending in the .dll file extension.
4. Move the .dll files—along with any accompanying asset folders included in the mod archive—directly into the PEAK/BepInEx/plugins folder.
5. If the mod author organized their zip archive with pre-built folder paths (e.g., containing its own internal plugins folder structure), extract the contents directly into your primary BepInEx folder to allow files to merge automatically.

Warning: Do not place nested .zip or .rar archive files directly into the plugins folder. BepInEx cannot read compressed archives; all files must be extracted beforehand.

Step 5: Verify Loader Injection and Configure Settings

Once files are positioned, you must confirm that the mod loader successfully injects your custom plugins during startup without throwing runtime execution errors.

1. Launch PEAK through your standard Steam launcher or short-cut icon.
2. Open the PEAK/BepInEx/LogOutput.log text document using Notepad or any text reader to evaluate loader performance.
3. Search the text document for lines starting with [Info : BepInEx] confirming that your specific mod .dll files were parsed and loaded into memory successfully.
4. Navigate to PEAK/BepInEx/config after running the game with the mod installed. You will find customizable configuration files ending in .cfg tailored to each installed mod.
5. Open any .cfg file using Notepad to adjust keybindings, visual overlays, gameplay multipliers, or performance parameters to suit your preferences. Save the file and restart the game for changes to take effect.

Mod Installation Methods & Architecture Comparison

Players can choose between manual BepInEx injection and automated package managers like Thunderstore Mod Manager or r2modman. The table below outlines technical distinctions, file system impact, and maintenance requirements across both approaches.

PEAK Modding Errors & Technical Field Fixes

When modifying game assembly files, system mismatches, outdated dependencies, or missing core files can cause runtime instability. Use these field-tested remedies to resolve persistent issues.

Mod Loader Fails to Inject (Game Boots Vanilla without Mods)

• Root Cause: BepInEx wrapper binary (winhttp.dll) is placed in a subfolder or blocked by local antivirus execution policies, preventing the application hook from hooking into PEAK.exe.
• Actionable Fix: Ensure winhttp.dll and doorstop_config.ini are situated in the exact same directory folder as PEAK.exe. Verify that the flag enabled = true is set inside doorstop_config.ini. Add an exclusion rule for the PEAK main installation folder inside your security or antivirus program.

Game Crashes on Boot with Black Screen or Immediate Termination

• Root Cause: A loaded .dll mod file was compiled against an outdated version of Unity Mono assemblies, or contains broken Harmony runtime patches that conflict with the current PEAK game patch.
• Actionable Fix: Open PEAK/BepInEx/LogOutput.log and scroll to the bottom to identify the specific plugin throwing NullReferenceException or TypeLoadException errors. Cut and paste suspect .dll files out of the BepInEx/plugins directory one by one until the game boots properly, then search for an updated release of the offending mod.

Multiplayer Desynchronization and Host Connection Failures

• Root Cause: Host and joining client possess mismatched mod lists, differing custom assembly versions, or conflicting gameplay configuration files that cause peer-to-peer network packet rejections.
• Actionable Fix: Ensure all players joining a lobby share identical versions of both PEAK and installed mods. Align all .cfg files located inside BepInEx/config across every connected machine, or stick strictly to client-side graphical or audio utility mods during online multiplayer matches.

Mod Settings and Configuration Edits Fail to Save

• Root Cause: Windows folder permission flags set the BepInEx/config subfolder to Read-Only, or a running background process holds an exclusive lock on the active .cfg configuration file.
• Actionable Fix: Right-click the PEAK/BepInEx folder, select Properties, uncheck the Read-Only attribute checkbox, and click Apply to all subfolders and files. Ensure PEAK is completely closed before saving edits made to mod settings files in Notepad.

Frequently Asked Questions

Can you install mods on PEAK for console versions like Xbox or PlayStation?

No, modding PEAK via BepInEx, custom runtime DLLs, or asset replacements requires direct access to game file directories and execution hooks available exclusively on Windows PC releases. Consoles do not support custom runtime assembly injection due to operating system sandbox restrictions.

Will using mods in PEAK cause a Steam VAC Ban?

No, PEAK does not utilize Valve Anti-Cheat (VAC) server protection. However, utilizing gameplay cheats or unauthorized mods on public dedicated or peer-to-peer multiplayer lobbies can cause desync crashes or lead to bans managed by community server hosts.

How do you completely remove all mods to play PEAK vanilla again?

To restore PEAK to its clean factory installation, navigate to your root game folder and delete the BepInEx directory, winhttp.dll, and doorstop_config.ini. After deleting these items, open Steam, right-click PEAK, select Properties > Installed Files, and click Verify integrity of game files.

What is the difference between client-side and host-side mods in PEAK?

Client-side mods alter user interfaces, graphic settings, local camera angles, or audio elements, functioning independently without requiring other players to have them installed. Host-side mods change core mechanics, map terrain generation, or item values, requiring the lobby host—and often joining players—to have identical scripts installed.

Elevate Your PEAK Modding Setup

Mastering custom mod installation transforms PEAK into an endlessly expandable playground with custom mechanics, enhanced visual fidelity, and tailormade performance optimizations. Keep your mod loader frameworks updated, monitor dependency chains, and back up your local configuration profiles to maintain a smooth, crash-free survival experience.