One-click Unreal Engine project builder. Auto-detects .uproject and engine version, generates project files, builds, and launches the editor. Drop into your project root and run it.

UE5 BuildProject.bat

@echo off
setlocal enabledelayedexpansion

:: === AUTO-DETECT PROJECT ===
set "SCRIPT_DIR=%~dp0"
cd /d "%SCRIPT_DIR%"

set "PROJECT_PATH="
for %%f in (*.uproject) do set "PROJECT_PATH=%SCRIPT_DIR%%%f"

if not defined PROJECT_PATH (
    echo ERROR: No .uproject file found in %SCRIPT_DIR%
    pause
    exit /b 1
)

for %%f in ("%PROJECT_PATH%") do set "PROJECT_NAME=%%~nf"
echo Found project: %PROJECT_NAME%

:: === AUTO-DETECT ENGINE ===
set "ENGINE_ID="
for /f "tokens=2 delims=:," %%a in ('findstr /i "EngineAssociation" "%PROJECT_PATH%"') do (
    set "ENGINE_ID=%%~a"
    set "ENGINE_ID=!ENGINE_ID: =!"
    set "ENGINE_ID=!ENGINE_ID:"=!"
)

echo Engine: %ENGINE_ID%

set "UE_ROOT="
for /f "tokens=2*" %%a in ('reg query "HKLM\SOFTWARE\EpicGames\Unreal Engine\%ENGINE_ID%" /v "InstalledDirectory" 2^>nul') do set "UE_ROOT=%%b"

if not defined UE_ROOT if exist "C:\Program Files\Epic Games\UE_%ENGINE_ID%" set "UE_ROOT=C:\Program Files\Epic Games\UE_%ENGINE_ID%"
if not defined UE_ROOT if exist "D:\Program Files\Epic Games\UE_%ENGINE_ID%" set "UE_ROOT=D:\Program Files\Epic Games\UE_%ENGINE_ID%"
if not defined UE_ROOT if exist "%SCRIPT_DIR%..\Engine\Build\BatchFiles\Build.bat" set "UE_ROOT=%SCRIPT_DIR%.."

if not defined UE_ROOT (
    echo ERROR: Could not find Unreal Engine %ENGINE_ID%
    pause
    exit /b 1
)

echo Engine Root: %UE_ROOT%

:: === CONFIG ===
set "BUILD_CONFIG=Development"
set "BUILD_PLATFORM=Win64"
set "TARGET=%PROJECT_NAME%Editor"
set "UBT_PATH=%UE_ROOT%\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.exe"
set "EDITOR_PATH=%UE_ROOT%\Engine\Binaries\Win64\UnrealEditor.exe"

:: === 1. GENERATE PROJECT FILES ===
echo.
echo [1/2] Generating project files...
"%UBT_PATH%" -projectfiles -project="%PROJECT_PATH%" -game -engine -progress
if %errorlevel% neq 0 (
    echo ERROR: Failed to generate project files.
    pause
    exit /b 1
)

:: === 2. BUILD ===
echo.
echo [2/2] Building %TARGET% (%BUILD_CONFIG% ^| %BUILD_PLATFORM%)...
call "%UE_ROOT%\Engine\Build\BatchFiles\Build.bat" %TARGET% %BUILD_PLATFORM% %BUILD_CONFIG% -project="%PROJECT_PATH%" -WaitMutex
if %errorlevel% neq 0 (
    echo.
    echo ERROR: Build failed.
    pause
    exit /b 1
)

echo.
echo ========================================
echo BUILD COMPLETE
echo ========================================

:: === 3. LAUNCH EDITOR ===
echo.
echo Launching Unreal Editor...
start "" "%EDITOR_PATH%" "%PROJECT_PATH%"