diff --git a/source/common/searchpaths.cpp b/source/common/searchpaths.cpp
index e687cec10..cde319846 100644
--- a/source/common/searchpaths.cpp
+++ b/source/common/searchpaths.cpp
@@ -90,7 +90,7 @@ struct RegistryPathInfo
 };
 
 static const char * gameroot[] = { "/gameroot", nullptr};
-//static const char * dukeaddons[] = { "/gameroot", "/gameroot/addons/dc", "/gameroot/addons/nw", "/gameroot/addons/vacation", nullptr};
+static const char * dukeaddons[] = { "/gameroot", "/gameroot/addons/dc", "/gameroot/addons/nw", "/gameroot/addons/vacation", nullptr};
 static const char * dn3d[] = { "/Duke Nukem 3D", nullptr};
 static const char * nam[] = { "/NAM", nullptr};
 static const char * ww2gi[] = { "/WW2GI", nullptr};
@@ -113,7 +113,7 @@ static const RegistryPathInfo paths[] = {
 	{ L"SOFTWARE" WOW64 "GOG.com\\Games\\1740836875", L"path", nullptr},
 
 	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 434050", L"InstallLocation", nullptr },
-	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 225140", L"InstallLocation", gameroot },
+	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 225140", L"InstallLocation", dukeaddons },
 	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 359850", L"InstallLocation", dn3d },
 	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 329650", L"InstallLocation", nam },
 	{ L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Steam App 376750", L"InstallLocation", ww2gi },
diff --git a/wadsrc/static/engine/grpinfo.txt b/wadsrc/static/engine/grpinfo.txt
index 799262d80..387937e1d 100644
--- a/wadsrc/static/engine/grpinfo.txt
+++ b/wadsrc/static/engine/grpinfo.txt
@@ -191,17 +191,6 @@ grpinfo
 	gamefilter "Duke.DukeDC"
 }
 
-addon
-{
-	// This is for loading the addon from the megaton edition without setting the path.
-	name "Duke it out in D.C."
-	flags GAMEFLAG_DUKE|GAMEFLAG_ADDON
-	dependency DUKE15_CRC
-	mustcontain "addons/dc/dukedc.grp"
-	loadgrp "addons/dc/dukedc.grp"
-	gamefilter "Duke.DukeDC"
-}
-
 // These are a bit strange but without anything to check I do not know in what way.
 //   { "Duke Caribbean: Life's a Beach (1.3D)", VACA13_CRC,  23559381, GAMEFLAG_DUKE|GAMEFLAG_ADDON, DUKE13_CRC, NULL, process_vaca13},
 //   { "Duke Caribbean: Life's a Beach (PPak)", VACAPP_CRC,  22551333, GAMEFLAG_DUKE|GAMEFLAG_ADDON, DUKEPP_CRC, NULL, process_vacapp15},
@@ -228,17 +217,6 @@ grpinfo
 	gamefilter "Duke.Vacation"
 }
 
-addon
-{
-	// This is for loading the addon from the megaton edition without setting the path.
-	name "Duke Caribbean: Life's a Beach"
-	flags GAMEFLAG_DUKE|GAMEFLAG_ADDON
-	dependency DUKE15_CRC
-	mustcontain "addons/vacation/vacation.grp"
-	loadgrp "addons/vacation/vacation.grp"
-	gamefilter "Duke.Vacation"
-}
-
 grpinfo
 {
 	name "Duke: Nuclear Winter"
@@ -250,19 +228,6 @@ grpinfo
 	gamefilter "Duke.NWinter"
 }
 
-addon
-{
-	// This is for loading the addon from the megaton edition without setting the path.
-	name "Duke: Nuclear Winter"
-	scriptname "NWINTER.CON"
-	flags GAMEFLAG_DUKE|GAMEFLAG_ADDON
-	dependency DUKE15_CRC
-	mustcontain "addons/nw/nwinter.grp"
-	loadgrp "addons/nw/nwinter.grp"
-	gamefilter "Duke.NWinter"
-}
-
-
 grpinfo
 {
 	name "Duke: Nuclear Winter Demo"