diff --git a/bin/ai/regression/run.vbs b/bin/ai/regression/run.vbs
new file mode 100644
--- /dev/null
+++ b/bin/ai/regression/run.vbs
@@ -0,0 +1,154 @@
+Option Explicit
+
+' $Id$
+'
+' This file is part of OpenTTD.
+' OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+' OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+' See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+
+Dim FSO
+Set FSO = CreateObject("Scripting.FileSystemObject")
+
+Function GetTestList()
+	Dim retests, i, tests, dir
+	Set retests = New RegExp
+	Set GetTestList = CreateObject("Scripting.Dictionary")
+
+	retests.Pattern = "ai/regression/tst_*"
+	retests.Global = True
+	For i = 0 To WScript.Arguments.Count - 1
+		Dim test
+		test = "ai/regression/tst_" & WScript.Arguments.Item(i)
+		If FSO.FolderExists(test) Then
+			retests.Pattern = test
+			Exit For
+		End If
+	Next
+
+	For Each dir In FSO.GetFolder("ai/regression/").SubFolders
+		Dim name
+		name = "ai/regression/" & dir.Name
+		If retests.Test(name) Then
+			GetTestList.Add name, name
+		End If
+	Next
+End Function
+
+Function GetParams()
+	GetParams = "-snull -mnull -vnull:ticks=30000"
+	If WScript.Arguments.Count = 0 Then Exit Function
+	If WScript.Arguments.Item(0) <> "-r" Then Exit Function
+	GetParams = ""
+End Function
+
+Sub FilterFile(filename)
+	Dim lines, filter, file
+
+	Set file = FSO.OpenTextFile(filename, 1)
+	If Not file.AtEndOfStream Then
+		lines = file.ReadAll
+	End If
+	file.Close
+
+	Set filter = New RegExp
+	filter.Global = True
+	filter.Multiline = True
+	filter.Pattern = "0x(\(nil\)|0+)(x0)?"
+	lines = filter.Replace(lines, "0x00000000")
+	filter.Pattern = "^dbg: \[script\]"
+	lines = filter.Replace(lines, "")
+	filter.Pattern = "^ "
+	lines = filter.Replace(lines, "ERROR: ")
+	filter.Pattern = "ERROR: \[1\] \[P\] "
+	lines = filter.Replace(lines, "")
+	filter.Pattern = "^dbg: .*\r\n"
+	lines = filter.Replace(lines, "")
+
+	Set file = FSO.OpenTextFile(filename, 2)
+	file.Write lines
+	file.Close
+End Sub
+
+Function CompareFiles(filename1, filename2)
+	Dim file, lines1, lines2
+	Set file = FSO.OpenTextFile(filename1, 1)
+	If Not file.AtEndOfStream Then
+		lines1 = file.ReadAll
+	End IF
+	file.Close
+	Set file = FSO.OpenTextFile(filename2, 1)
+	If Not file.AtEndOfStream Then
+		lines2 = file.ReadAll
+	End IF
+	file.Close
+	CompareFiles = (lines1 = lines2)
+End Function
+
+Function RunTest(test, params, ret)
+	Dim WshShell, oExec, sav, command
+	Set WshShell = CreateObject("WScript.Shell")
+
+	' Make sure that only one info.nut is present for each test run. Otherwise openttd gets confused.
+	FSO.CopyFile "ai/regression/regression_info.nut", test & "/info.nut"
+
+	sav = test & "/test.sav"
+	If Not FSO.FileExists(sav) Then
+		sav = "ai/regression/empty.sav"
+	End If
+
+	command = ".\openttd -x -c ai/regression/regression.cfg " & params & " -g " & sav & " -d script=2 -d misc=9"
+	' 2>&1 must be after >tmp.regression, else stderr is not redirected to the file
+	WshShell.Run "cmd /c " & command & " >tmp.regression 2>&1", 0, True
+
+	FilterFile "tmp.regression"
+
+	If CompareFiles(test & "/result.txt", "tmp.regression") Then
+		RunTest = "passed!"
+	Else
+		RunTest = "failed!"
+		ret = 1
+	End If
+
+	FSO.DeleteFile test & "/info.nut"
+End Function
+
+On Error Resume Next
+WScript.StdOut.WriteLine ""
+If Err.Number <> 0 Then
+	WScript.Echo "This script must be started with cscript."
+	WScript.Quit 1
+End If
+On Error Goto 0
+
+If Not FSO.FileExists("ai/regression/run.vbs") Then
+	WScript.Echo "Make sure you are in the root of OpenTTD before starting this script."
+	WScript.Quit 1
+End If
+
+If FSO.FileExists("scripts/game_start.scr") Then
+	FSO.MoveFile "scripts/game_start.scr", "scripts/game_start.scr.regression"
+End If
+
+Dim params, test, ret
+params = GetParams()
+ret = 0
+
+For Each test in GetTestList()
+	WScript.StdOut.Write "Running " & test & "... "
+	WScript.StdOut.WriteLine RunTest(test, params, ret)
+Next
+
+If FSO.FileExists("scripts/game_start.scr.regression") Then
+	FSO.MoveFile "scripts/game_start.scr.regression", "scripts/game_start.scr"
+End If
+
+If WScript.Arguments.Count > 0 Then
+	If WScripts.Arguments.Items(0) = "-k" Then
+		WScript.Quit ret
+	End If
+End If
+
+FSO.DeleteFile "tmp.regression"
+
+WScript.Quit ret