diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d8364e1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+3rd-party-bin
diff --git a/builder b/builder
new file mode 100644
index 0000000..504652d
--- /dev/null
+++ b/builder
@@ -0,0 +1,438 @@
+#!/bin/bash
+
+# Requirements: git-bash
+# https://git-scm.com/download/win
+
+set -Eeuo pipefail
+# set -o xtrace
+
+trap cleanup SIGINT SIGTERM ERR EXIT
+
+ScriptFullname=$(readlink -e "$0")
+ScriptName=$(basename "$0")
+ScriptDir=$(dirname "$ScriptFullname")
+
+source "$ScriptDir/helper.lib"
+
+# Common
+SteamPath=$(reg_readkey "HKCU\Software\Valve\Steam" "SteamPath")
+DocumentsPath=$(reg_readkey "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" "Personal")
+WorkDir="$(dirname "$(readlink -e "$0")")"
+ThirdPartyBin="$ScriptDir/3rd-party-bin"
+
+# Usefull KF2 executables / Paths / Configs
+KFDoc="$DocumentsPath/My Games/KillingFloor2"
+KFPath="$SteamPath/steamapps/common/killingfloor2"
+KFWin64="$KFPath/Binaries/Win64"
+KFEditor="$KFWin64/KFEditor.exe"
+KFEditorPatcher="$KFWin64/kfeditor_patcher.exe"
+KFEditorMergePackages="$KFWin64/KFEditor_mergepackages.exe"
+KFGame="$KFWin64/KFGame.exe"
+KFWorkshop="$KFPath/Binaries/WorkshopUserTool.exe"
+KFUnpublish="$KFDoc/KFGame/Unpublished"
+KFPublish="$KFDoc/KFGame/Published"
+KFEditorConf="$KFDoc/KFGame/Config/KFEditor.ini"
+
+# Source filesystem
+MutSource="$ScriptDir/.."
+MutPubContent="$MutSource/PublicationContent"
+MutConfig="$MutSource/Config"
+MutLocalization="$MutSource/Localization"
+MutBuildConfig="$MutSource/build.ini" # not ini at all but who cares? :D
+MutTestConfig="$MutSource/test.ini"
+
+# Steam workshop upload filesystem
+KFUnpublishBrewedPC="$KFUnpublish/BrewedPC"
+KFUnpublishPackages="$KFUnpublishBrewedPC/Packages"
+KFUnpublishScript="$KFUnpublishBrewedPC/Script"
+KFUnpublishConfig="$KFUnpublish/Config"
+KFUnpublishLocalization="$KFUnpublish/Localization"
+KFPublishBrewedPC="$KFPublish/BrewedPC"
+KFPublishPackages="$KFPublishBrewedPC/Packages"
+KFPublishScript="$KFPublishBrewedPC/Script"
+KFPublishConfig="$KFPublish/Config"
+KFPublishLocalization="$KFPublish/Localization"
+
+# Tmp files
+MutWsInfoName="wsinfo.txt"
+MutWsInfo="$KFDoc/$MutWsInfoName"
+KFEditorConfBackup="$KFEditorConf.backup"
+
+function show_help ()
+{
+	cat <<EOF
+Usage: $ScriptName OPTION
+
+Build, pack, test and upload your kf2 packages to the Steam Workshop.
+
+Available options:
+ -ib, --init-build   generate $(basename "$MutBuildConfig") with build parameters 
+ -it, --init-test    generate $(basename "$MutTestConfig") with test parameters 
+  -i, --init         the same as "./$ScriptName --init-build; ./$ScriptName --init-test"
+  -c, --compile      build package(s)
+  -b, --brew         compress *.upk and place inside *.u
+ -bm, --brew-manual  the same (almost) as above, but with patched kfeditor by @notpeelz
+  -u, --upload       upload package(s) to the Steam Workshop 
+  -t, --test         run local single player test with $(basename "$MutTestConfig") parameters
+  -h, --help         show this help
+EOF
+}
+
+function cleanup()
+{
+	trap - SIGINT SIGTERM ERR EXIT
+	restore_kfeditorconf
+}
+
+function backup_kfeditorconf ()
+{
+	cp -f "$KFEditorConf" "$KFEditorConfBackup"
+}
+
+function restore_kfeditorconf ()
+{
+	if [[ -f "$KFEditorConfBackup" ]]; then
+		mv -f "$KFEditorConfBackup" "$KFEditorConf"
+	fi
+}
+
+function init_build ()
+{
+	local PackageList=""
+	
+	:> "$MutBuildConfig"
+	
+	while read Package
+	do
+		if [[ -z "$PackageList" ]]; then
+			PackageList="$Package"
+		else
+			PackageList="$PackageList $Package"
+		fi
+	done < <(find "$MutSource" -mindepth 2 -maxdepth 2 -type d -ipath '*/Classes' | sed -r 's|.+/([^/]+)/[^/]+|\1|' | sort)
+	
+	echo "PackageBuildOrder=\"$PackageList\""  >> "$MutBuildConfig"
+	echo "PackageUpload=\"$PackageList\"" >> "$MutBuildConfig"
+}
+
+function read_build_settings ()
+{
+	if ! [[ -f "$MutBuildConfig" ]]; then init_build; fi
+	
+	if bash -n "$MutBuildConfig"; then
+		source "$MutBuildConfig"
+	else
+		echo "$MutBuildConfig broken! Check this file before continue or create new one using $0 --init-build"
+		return 1
+	fi
+}
+
+function read_test_settings ()
+{
+	if ! [[ -f "$MutTestConfig" ]]; then init_test;	fi
+	
+	if bash -n "$MutTestConfig"; then
+		source "$MutTestConfig"
+	else
+		echo "$MutTestConfig broken! Check this file before continue or create new one using $0 --init-test"
+		return 1
+	fi
+}
+
+function merge_packages () # $1: Mutator name
+{
+	local UpkList=""
+	
+	cp -f "$KFUnpublishScript/$1.u" "$KFWin64"
+	
+	while read Upk
+	do
+		cp -f "$MutSource/$1/$Upk" "$KFWin64"
+		UpkList="$UpkList $Upk"
+	done < <(find "$MutSource/$1" -type f -name '*.upk' -printf "%f\n")
+	
+	if [[ -n "$UpkList" ]]; then
+		local ModificationTime=$(stat -c %y "$KFWin64/$1.u")
+		CMD //C "cd "$(cygpath -w "$KFWin64")" && $(basename "$KFEditorMergePackages") make $UpkList $1.u" &
+		local PID="$!"
+		while ps -p "$PID" &> /dev/null
+		do
+			if [[ "$ModificationTime" != "$(stat -c %y "$KFWin64/$1.u")" ]]; then # file changed
+				sleep 2 # wait a bit in case the file hasn't been written to the end yet 
+				kill "$PID"; break
+			fi
+			sleep 2
+		done
+	fi
+	
+	for Upk in $UpkList; do	rm -f "$KFWin64/$Upk"; done # cleanup
+}
+
+function compiled ()
+{
+	for Package in $PackageBuildOrder
+	do
+		if ! test -f "$KFUnpublishScript/$Package.u"; then
+			return 1
+		fi
+	done
+}
+
+function compile ()
+{
+	read_build_settings
+	
+	if ! command -v multini &> /dev/null; then
+		get_latest_multini "$ThirdPartyBin"
+	fi
+	
+	backup_kfeditorconf
+	
+	multini --del "$KFEditorConf" 'ModPackages' 'ModPackages'
+	for Package in $PackageBuildOrder
+	do
+		multini --add "$KFEditorConf" 'ModPackages' 'ModPackages' "$Package"
+	done
+	multini --set "$KFEditorConf" 'ModPackages' 'ModPackagesInPath' "$(cygpath -w "$MutSource")"
+	
+	rm -rf "$KFUnpublish" "$KFPublish"
+	
+	mkdir -p "$KFUnpublishPackages" "$KFUnpublishScript"
+	find $PackageBuildOrder -type f -name '*.upk' -exec cp -f {} "$KFUnpublishPackages" \;
+	
+	if [[ -d "$MutLocalization" ]]; then
+		mkdir -p "$KFUnpublishLocalization"
+		cp -rf "$MutLocalization"/* "$KFUnpublishLocalization"
+	fi
+	
+	if [[ -d "$MutConfig" ]]; then
+		mkdir -p "$KFUnpublishConfig"
+		cp -rf "$MutConfig"/* "$KFUnpublishConfig"
+	fi
+	
+	CMD //C "$(cygpath -w "$KFEditor")" make -useunpublished &
+	local PID="$!"
+	while ps -p "$PID" &> /dev/null
+	do
+		if compiled; then kill "$PID"; break; fi
+		sleep 2
+	done 
+	
+	restore_kfeditorconf
+}
+
+function publish_common ()
+{
+	if [[ -d "$MutLocalization" ]]; then
+		mkdir -p "$KFPublishLocalization"
+		cp -rf "$MutLocalization"/* "$KFPublishLocalization"
+	fi
+	
+	if [[ -d "$MutConfig" ]]; then
+		mkdir -p "$KFPublishConfig"
+		cp -rf "$MutConfig"/* "$KFPublishConfig"
+	fi
+}
+
+function brewed ()
+{
+	for Package in $PackageUpload
+	do
+		if ! test -f "$KFPublishBrewedPC/$Package.u"; then
+			return 1
+		fi
+	done
+}
+
+function brew ()
+{
+	read_build_settings
+	
+	if ! compiled ; then
+		echo "You must compile packages before brewing. Use $0 --compile for this."
+		exit 1
+	fi
+	
+	rm -rf "$KFPublish"
+	
+	mkdir -p "$KFPublishBrewedPC"
+	
+	CMD //C "cd "$(cygpath -w "$KFWin64")" && "$(basename "$KFEditor")" brewcontent -platform=PC $PackageUpload -useunpublished" &
+	local PID="$!"
+	while ps -p "$PID" &> /dev/null
+	do
+		if brewed; then kill "$PID"; break; fi
+		sleep 2
+	done
+	
+	publish_common
+	
+	rm -f "$KFPublishBrewedPC"/*.tmp # cleanup
+}
+
+function brew_manual ()
+{
+	read_build_settings
+	
+	if ! compiled ; then
+		echo "You must compile packages before brewing. Use $0 --compile for this."
+		exit 1
+	fi
+	
+	rm -rf "$KFPublish"
+	
+	mkdir -p "$KFPublishBrewedPC" "$KFPublishScript"
+
+	if ! [[ -x "$KFEditorPatcher" ]]; then
+		get_latest_kfeditor_patcher "$KFEditorPatcher"
+	fi
+	
+	pushd "$KFWin64" && "$KFEditorPatcher"; popd
+	
+	for Package in $PackageUpload
+	do
+		merge_packages "$Package"
+		mv "$KFWin64/$Package.u" "$KFPublishScript"
+	done
+	
+	publish_common
+}
+
+function upload ()
+{
+	read_build_settings
+	
+	if ! compiled ; then
+		echo "You must compile packages before uploading. Use $0 --compile for this."
+		exit 1
+	fi
+	
+	if ! [[ -d "$KFPublish" ]]; then
+		echo "Warn: uploading without brewing"
+		mkdir -p "$KFPublishBrewedPC" "$KFPublishScript"
+		
+		for Package in $PackageUpload
+		do
+			cp -f "$KFUnpublishScript/$Package.u" "$KFPublishScript"
+		done
+		
+		if [[ -d "$KFUnpublishPackages" ]]; then
+			cp -rf "$KFUnpublishPackages" "$KFPublishPackages"
+		fi
+		
+		publish_common
+	fi
+	
+	local PreparedWsDir=$(mktemp -d -u -p "$KFDoc")
+	
+	cat > "$MutWsInfo" <<EOF
+\$Description \"$(cat "$MutPubContent/description.txt")\"
+\$Title \"$(cat "$MutPubContent/title.txt")\"
+\$PreviewFile \"$(cygpath -w "$MutPubContent/preview.png")\"
+\$Tags \"$(cat "$MutPubContent/tags.txt")\"
+\$MicroTxItem \"false\"
+\$PackageDirectory \"$(cygpath -w "$PreparedWsDir")\"
+EOF
+	
+	cp -rf "$KFPublish"/* "$PreparedWsDir"
+	
+	CMD //C "$(cygpath -w "$KFWorkshop")" "$MutWsInfoName"
+	
+	rm -rf "$PreparedWsDir"
+	rm -f "$MutWsInfo"
+}
+
+function init_test ()
+{
+	local AviableMutators=""
+	local AviableGamemodes=""
+	
+	for Package in $PackageUpload
+	do
+		# find available mutators
+		while read MutClass
+		do
+			if [[ -z "$AviableMutators" ]]; then
+				AviableMutators="$Package.$MutClass"
+			else
+				AviableMutators="$AviableMutators,$Package.$MutClass"
+			fi
+		done < <(grep -rihPo '\s.+extends\s(KF)?Mutator' "$MutSource/$Package" | awk '{ print $1 }')
+		
+		# find available gamemodes
+		while read GamemodeClass
+		do
+			if [[ -z "$AviableGamemodes" ]]; then
+				AviableGamemodes="$Package.$MutClass"
+			else
+				AviableGamemodes="$AviableGamemodes,$Package.$MutClass"
+			fi
+		done < <(grep -rihPo '\s.+extends\sKFGameInfo_' "$MutSource/$Package" | awk '{ print $1 }')
+	done
+	
+	if [[ -z "$AviableGamemodes" ]]; then
+		AviableGamemodes="KFGameContent.KFGameInfo_Survival"
+	fi
+	
+	cat > "$MutTestConfig" <<EOF
+# Test parameters 
+
+# Map:
+Map="KF-Nuked"
+
+# Game:
+# Survival:       KFGameContent.KFGameInfo_Survival
+# WeeklyOutbreak: KFGameContent.KFGameInfo_WeeklySurvival
+# Endless:        KFGameContent.KFGameInfo_Endless
+# Objective:      KFGameContent.KFGameInfo_Objective
+# Versus:         KFGameContent.KFGameInfo_VersusSurvival
+Game="$AviableGamemodes"
+
+# Difficulty:
+# Normal:         0
+# Hard:           1
+# Suicide:        2
+# Hell:           3
+Difficulty="0"
+
+# GameLength:
+# 4  waves:       0
+# 7  waves:       1
+# 10 waves:       2
+GameLength="0"
+
+# Mutators
+Mutators="$AviableMutators"
+
+# Additional parameters
+Args=""
+EOF
+}
+
+function run_test ()
+{
+	local UseUnpublished=""
+	
+	read_build_settings
+	read_test_settings
+	
+	if ! brewed; then UseUnpublished="-useunpublished"; fi
+	
+	CMD //C "$(cygpath -w "$KFGame")" $Map?Difficulty=$Difficulty?GameLength=$GameLength?Game=$Game?Mutator=$Mutators?$Args $UseUnpublished -log
+}
+
+export PATH="$PATH:$ThirdPartyBin"
+
+if [[ $# -eq 0 ]]; then show_help; exit 0; fi
+case $1 in
+	  -h|--help             ) show_help             ;;
+	 -ib|--init-build       ) init_build            ;;
+	 -it|--init-test        ) init_test             ;;
+	  -i|--init             ) init_build; init_test ;;
+	  -c|--compile          ) compile               ;;
+	  -b|--brew             ) brew                  ;;
+	 -bm|--brew-manual      ) brew_manual           ;;
+	  -u|--upload           ) upload                ;;
+	  -t|--test             ) run_test              ;;
+	    *                   ) echo "Command not recognized: $1"; exit 1 ;;
+esac
diff --git a/helper.lib b/helper.lib
new file mode 100644
index 0000000..d8a672d
--- /dev/null
+++ b/helper.lib
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+function reg_readkey () # $1: path, $2: key
+{
+	cygpath -u $(
+	reg query "$1" //v "$2" | \
+	grep -F "$2"            | \
+	awk '{ $1=$2=""; print $0 }' )
+}
+
+function get_latest () # $1: Reponame, $2: filename, $3: output filename
+{
+	local ApiUrl="https://api.github.com/repos/$1/releases/latest"
+	local LatestTag=$(curl --silent "$ApiUrl" | grep -Po '"tag_name": "\K.*?(?=")')
+	local DownloadUrl="https://github.com/$1/releases/download/$LatestTag/$2"
+	
+	mkdir -p $(dirname "$3")
+	curl -LJs "$DownloadUrl" -o "$3"
+}
+
+function get_latest_multini () # $1: file to save
+{
+	get_latest "GenZmeY/multini" "multini-windows-amd64.exe" "$1"
+}
+
+function get_latest_kfeditor_patcher () # $1: file to save
+{
+	get_latest "notpeelz/kfeditor-patcher" "kfeditor_patcher.exe" "$1"
+}