diff --git a/games/gnukem/Makefile b/games/gnukem/Makefile
new file mode 100644
index 00000000000..5322cf513b0
--- /dev/null
+++ b/games/gnukem/Makefile
@@ -0,0 +1,38 @@
+# $OpenBSD: Makefile,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+COMMENT =	open source retro-style 2D scrolling platform shooter game
+DISTNAME =	gnukem-1.0
+CATEGORIES =	games x11
+
+HOMEPAGE =	https://djoffe.com/gnukem/
+MAINTAINER =	Brian Callahan <bcallah@openbsd.org>
+
+# Dual licensed: MIT or GPLv2 only
+PERMIT_PACKAGE_CDROM =	Yes
+
+WANTLIB += ${COMPILER_LIBCXX} SDL SDL_mixer c m
+
+# Upstream data fetching is ugh...
+MASTER_SITES =	https://mirrors.nycbug.org/pub/distfiles/
+
+LIB_DEPENDS =	devel/sdl-mixer
+
+USE_GMAKE =	Yes
+ALL_TARGET =	default
+MAKE_FLAGS =	CC="${CC}" CPP="${CXX}" \
+		CXXFLAGS="${CXXFLAGS}"
+
+NO_TEST =	Yes
+
+# No install routine
+do-install:
+	${INSTALL_DATA_DIR} ${PREFIX}/share/gnukem/data
+	cd ${WRKSRC}/data && find * -type d -exec ${INSTALL_DATA_DIR} \
+		"${PREFIX}/share/gnukem/data/{}" \;
+	cd ${WRKSRC}/data && find * -type f -exec ${INSTALL_DATA} \
+		"{}" "${PREFIX}/share/gnukem/data/{}" \;
+	echo "#!/bin/sh\ncd ${TRUEPREFIX}/share/gnukem && ./davegnukem \"\$$@\"" >> ${WRKSRC}/gnukem.sh
+	${INSTALL_PROGRAM} ${WRKSRC}/davegnukem ${PREFIX}/share/gnukem
+	${INSTALL_SCRIPT} ${WRKSRC}/gnukem.sh ${PREFIX}/bin/davegnukem
+
+.include <bsd.port.mk>
diff --git a/games/gnukem/distinfo b/games/gnukem/distinfo
new file mode 100644
index 00000000000..eb2a116a4e2
--- /dev/null
+++ b/games/gnukem/distinfo
@@ -0,0 +1,2 @@
+SHA256 (gnukem-1.0.tar.gz) = KOX8oFvgtUKGmrP9x8J2dNr9VvfPFmzFp+2dFDxMDKs=
+SIZE (gnukem-1.0.tar.gz) = 20553539
diff --git a/games/gnukem/patches/patch-Makefile b/games/gnukem/patches/patch-Makefile
new file mode 100644
index 00000000000..dfa54b00b42
--- /dev/null
+++ b/games/gnukem/patches/patch-Makefile
@@ -0,0 +1,32 @@
+$OpenBSD: patch-Makefile,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+Fix up Makefile.
+
+Index: Makefile
+--- Makefile.orig
++++ Makefile
+@@ -8,8 +8,8 @@
+ # 2017-07-29: Remove obsolete standalone-editor-related stuff, and add new thing_monsters.o
+ #
+ 
+-CPP = g++
+-CC = gcc
++CPP ?= g++
++CC ?= gcc
+ 
+ 
+ # dj2016-10 Add L -I/usr/local/include/SDL in process of getting this working on Mac OS X - not sure if this is 'bad' to just have both /usr/include and /usr/local/include??
+@@ -21,11 +21,11 @@ INCLUDEDIRS= -I/usr/include/SDL -I/usr/local/include/S
+ # If you don't -DDATA_DIR to a valid dir, then data files will be assumed
+ # to be in current directory
+ #CCFLAGS = -Wall -I/usr/local/include -DHAVE_SOUND -DDEBUG -O -m486
+-CCFLAGS = -Wall -Wno-switch -DDEBUG $(INCLUDEDIRS)
++CCFLAGS = ${CXXFLAGS} -Wall -Wno-switch -I${LOCALBASE}/include/SDL
+ #Release version:
+ #CCFLAGS = -O -Wall -I/usr/local/include -DHAVE_SOUND $(INCLUDEDIRS)
+ 
+-LIBS = -lSDL -lSDLmain -lSDL_mixer -lpthread 
++LIBS = -L${LOCALBASE}/lib -lSDL -lSDLmain -lSDL_mixer -lpthread 
+ BIN = davegnukem
+ 
+ 
diff --git a/games/gnukem/patches/patch-src_datadir_h b/games/gnukem/patches/patch-src_datadir_h
new file mode 100644
index 00000000000..07e4f828c48
--- /dev/null
+++ b/games/gnukem/patches/patch-src_datadir_h
@@ -0,0 +1,16 @@
+$OpenBSD: patch-src_datadir_h,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+Only define DATA_DIR if you haven't already.
+
+Index: src/datadir.h
+--- src/datadir.h.orig
++++ src/datadir.h
+@@ -10,6 +10,8 @@ Copyright (C) 1999-2018 David Joffe
+ #define _DATADIR_H_
+ 
+ //! Data directory [dj2017-08 should this move to config.h?]
++#ifndef DATA_DIR
+ #define DATA_DIR "data/"
++#endif
+ 
+ #endif
diff --git a/games/gnukem/patches/patch-src_djimage_cpp b/games/gnukem/patches/patch-src_djimage_cpp
new file mode 100644
index 00000000000..eebe4a4a25c
--- /dev/null
+++ b/games/gnukem/patches/patch-src_djimage_cpp
@@ -0,0 +1,57 @@
+$OpenBSD: patch-src_djimage_cpp,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+Fix big endian issue
+
+Index: src/djimage.cpp
+--- src/djimage.cpp.orig
++++ src/djimage.cpp
+@@ -264,8 +264,13 @@ int djImage::LoadTGA( const char * szFilename )
+ 					for ( unsigned int j=0; j<nWidth; j++ )
+ 					{
+ 						// reverse endianness from file
++						#if SDL_BYTEORDER==SDL_BIG_ENDIAN
++						m_pData[iOffset+j*2+1] = pBuf[j*2+1];
++						m_pData[iOffset+j*2+0] = pBuf[j*2+0];
++						#else
+ 						m_pData[iOffset+j*2+0] = pBuf[j*2+1];
+ 						m_pData[iOffset+j*2+1] = pBuf[j*2+0];
++						#endif
+ 					}
+ 				}
+ 				djDELV(pBuf);
+@@ -285,10 +290,17 @@ int djImage::LoadTGA( const char * szFilename )
+ 					for ( unsigned int j=0; j<nWidth; j++ )
+ 					{
+ 						// A,B,G,R
++						#if SDL_BYTEORDER==SDL_BIG_ENDIAN
++						m_pData[iOffset + j*4+3] = pBuf[j*3+0];
++						m_pData[iOffset + j*4+2] = pBuf[j*3+1];
++						m_pData[iOffset + j*4+1] = pBuf[j*3+2];
++						m_pData[iOffset + j*4+0] = 0xFF;
++						#else
+ 						m_pData[iOffset + j*4+0] = pBuf[j*3+0];
+ 						m_pData[iOffset + j*4+1] = pBuf[j*3+1];
+ 						m_pData[iOffset + j*4+2] = pBuf[j*3+2];
+ 						m_pData[iOffset + j*4+3] = 0xFF;
++						#endif
+ 					}
+ 				}
+ 				djDELV(pBuf);
+@@ -314,10 +326,17 @@ int djImage::LoadTGA( const char * szFilename )
+ 						// FIXME: Interesting "problem" .. it seems the VNC server
+ 						// inverts the ordering of some of this stuff! So while doing
+ 						// the remote thing I had everything confused!
++						#if SDL_BYTEORDER==SDL_BIG_ENDIAN
++						m_pData[iOffset + j*4+3] = pBuf[j*4+0];
++						m_pData[iOffset + j*4+2] = pBuf[j*4+1];
++						m_pData[iOffset + j*4+1] = pBuf[j*4+2];
++						m_pData[iOffset + j*4+0] = pBuf[j*4+3];
++						#else
+ 						m_pData[iOffset + j*4+0] = pBuf[j*4+0];
+ 						m_pData[iOffset + j*4+1] = pBuf[j*4+1];
+ 						m_pData[iOffset + j*4+2] = pBuf[j*4+2];
+ 						m_pData[iOffset + j*4+3] = pBuf[j*4+3];
++						#endif
+ 					}
+ //					memcpy(m_pData+(bFlipY?(nHeight-i-1):i)*Pitch(), pBuf, nWidth*4);
+ 				}
diff --git a/games/gnukem/patches/patch-src_game_cpp b/games/gnukem/patches/patch-src_game_cpp
new file mode 100644
index 00000000000..2862167ca69
--- /dev/null
+++ b/games/gnukem/patches/patch-src_game_cpp
@@ -0,0 +1,16 @@
+$OpenBSD: patch-src_game_cpp,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+This needs to be unsigned since we're dealing with numbers >127.
+
+Index: src/game.cpp
+--- src/game.cpp.orig
++++ src/game.cpp
+@@ -2014,7 +2014,7 @@ bool HeroIsHurting()
+ void DrawHealth()
+ {
+ 	// Build a string representing health bars (which are in the 8x8 font)
+-	char szHealth[MAX_HEALTH+1]={0};
++	unsigned char szHealth[MAX_HEALTH+1]={0};
+ 	for ( unsigned int i=0; i<MAX_HEALTH; ++i )
+ 	{
+ 		// 170 = health; 169 = not health
diff --git a/games/gnukem/patches/patch-src_sdl_djgraph_cpp b/games/gnukem/patches/patch-src_sdl_djgraph_cpp
new file mode 100644
index 00000000000..87d2c898279
--- /dev/null
+++ b/games/gnukem/patches/patch-src_sdl_djgraph_cpp
@@ -0,0 +1,23 @@
+OpenBSD$
+
+Revert commit/a94bae1f70b9110431f8a21f0118141c25a343d8
+
+Index: src/sdl/djgraph.cpp
+--- src/sdl/djgraph.cpp.orig
++++ src/sdl/djgraph.cpp
+@@ -600,15 +600,10 @@ bool djCreateImageHWSurface( djImage* pImage/*, djVisu
+ 		pImage->Height(),
+ 		32,
+ 		pImage->Pitch(),
+-		// R,G,B,A masks (dj2018-03 specify different masks here on PPC etc. - see https://github.com/davidjoffe/dave_gnukem/issues/100 - thanks to @BeWorld2018 for report and patch suggestion)
+-		#if SDL_BYTEORDER==SDL_BIG_ENDIAN
+-		0x0000FF00, 0X00FF0000, 0xFF000000, 0x000000FF
+-		#else
+ 		0xFF0000,
+ 		0xFF00,
+ 		0xFF,
+ 		0xFF000000
+-		#endif
+ 	);
+ 	g_SurfaceMap[ pImage ] = pSurfaceFoo;
+ 
diff --git a/games/gnukem/patches/patch-src_sdl_djsound_cpp b/games/gnukem/patches/patch-src_sdl_djsound_cpp
new file mode 100644
index 00000000000..e137367d7f0
--- /dev/null
+++ b/games/gnukem/patches/patch-src_sdl_djsound_cpp
@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_sdl_djsound_cpp,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+Index: src/sdl/djsound.cpp
+--- src/sdl/djsound.cpp.orig
++++ src/sdl/djsound.cpp
+@@ -13,7 +13,7 @@ Copyright (C) 1999-2018 David Joffe and Kent Mein
+ #include <SDL_mixer.h>
+ #endif
+ 
+-#ifdef __APPLE__
++#ifdef __OpenBSD__
+ #include <stdlib.h>//Fixing malloc.h 'not found' error compiling on Mac [dj2016-10]
+ #else
+ #include <malloc.h>
diff --git a/games/gnukem/patches/patch-src_sys_defs_h b/games/gnukem/patches/patch-src_sys_defs_h
new file mode 100644
index 00000000000..2ebccf8458e
--- /dev/null
+++ b/games/gnukem/patches/patch-src_sys_defs_h
@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_sys_defs_h,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+
+Index: src/sys_defs.h
+--- src/sys_defs.h.orig
++++ src/sys_defs.h
+@@ -21,7 +21,7 @@ extern "C"
+ #include <stdarg.h>
+ #include <stddef.h>
+ #include <string.h>
+-#ifdef __APPLE__
++#ifdef __OpenBSD__
+ #include <stdlib.h>//Fixing malloc.h 'not found' error compiling on Mac [dj2016-10]
+ #else
+ #include <malloc.h>
diff --git a/games/gnukem/pkg/DESCR b/games/gnukem/pkg/DESCR
new file mode 100644
index 00000000000..221fba1ad99
--- /dev/null
+++ b/games/gnukem/pkg/DESCR
@@ -0,0 +1,5 @@
+Dave Gnukem is an open source retro-style 2D scrolling platform shooter,
+inspired by and similar to Duke Nukem 1 (a famous original 1991 game
+that launched the Duke Nukem series). It features an integrated level
+editor. (Please note this is not a 'clone' or a 're-make'; it is
+probably most akin to a parody.)
diff --git a/games/gnukem/pkg/PLIST b/games/gnukem/pkg/PLIST
new file mode 100644
index 00000000000..a79f282a375
--- /dev/null
+++ b/games/gnukem/pkg/PLIST
@@ -0,0 +1,102 @@
+@comment $OpenBSD: PLIST,v 1.1.1.1 2019/05/04 02:00:17 bcallah Exp $
+bin/davegnukem
+share/gnukem/
+share/gnukem/data/
+share/gnukem/data/credits.tga
+share/gnukem/data/default.gam
+share/gnukem/data/editor/
+share/gnukem/data/editor/macros.txt
+share/gnukem/data/emh/
+share/gnukem/data/emh/nextm1.lev
+share/gnukem/data/emh/nextm2.lev
+share/gnukem/data/font.tga
+share/gnukem/data/fonts/
+share/gnukem/data/fonts/simple_6x8.tga
+share/gnukem/data/fonts/simple_6x8_shadow.tga
+share/gnukem/data/gameskin.tga
+share/gnukem/data/hiscores.tga
+share/gnukem/data/icon/
+share/gnukem/data/icon.bmp
+share/gnukem/data/icon/application_icon.ico
+share/gnukem/data/levels/
+share/gnukem/data/levels/bg1.tga
+share/gnukem/data/levels/bg2.tga
+share/gnukem/data/levels/citybackdrop.tga
+share/gnukem/data/levels/d_lev1.lev
+share/gnukem/data/levels/dj0.lev
+share/gnukem/data/levels/example.lev
+share/gnukem/data/levels/foo.lev
+share/gnukem/data/levels/kevin.lev
+share/gnukem/data/levels/level1.lev
+share/gnukem/data/levels/level2.lev
+share/gnukem/data/levels/level3.lev
+share/gnukem/data/levels/sjm001.lev
+share/gnukem/data/levels/sjm2.lev
+share/gnukem/data/levels/template.lev
+share/gnukem/data/main.tga
+share/gnukem/data/menucharbackground.tga
+share/gnukem/data/missions.txt
+share/gnukem/data/music/
+share/gnukem/data/music/eric_matyas/
+share/gnukem/data/music/eric_matyas/8-Bit-Mayhem.ogg
+share/gnukem/data/music/eric_matyas/Dystopic-Mayhem.ogg
+share/gnukem/data/music/eric_matyas/Escape_Looping.ogg
+share/gnukem/data/music/eric_matyas/Funky-Gameplay_Looping.ogg
+share/gnukem/data/music/eric_matyas/Insane-Gameplay_Looping.ogg
+share/gnukem/data/music/eric_matyas/Mad-Scientist_Looping.ogg
+share/gnukem/data/music/eric_matyas/Monkey-Drama.ogg
+share/gnukem/data/music/eric_matyas/Monster-Street-Fighters.ogg
+share/gnukem/data/music/eric_matyas/Monsters-in-Bell-Bottoms_Looping.ogg
+share/gnukem/data/music/eric_matyas/Retro-Frantic_V001_Looping.ogg
+share/gnukem/data/music/eric_matyas/Techno-Caper.ogg
+share/gnukem/data/music/eric_matyas/Techno-Gameplay_Looping.ogg
+share/gnukem/data/music/eric_matyas/The-Darkness-Below_Looping.ogg
+share/gnukem/data/sample.gam
+share/gnukem/data/shadows.tga
+share/gnukem/data/simplefont.tga
+share/gnukem/data/sounds/
+share/gnukem/data/sounds/cardflip.wav
+share/gnukem/data/sounds/exit.ogg
+share/gnukem/data/sounds/explode.wav
+share/gnukem/data/sounds/jump.wav
+share/gnukem/data/sounds/jump_landing.wav
+share/gnukem/data/sounds/key_pickup.wav
+share/gnukem/data/sounds/laser.wav
+share/gnukem/data/sounds/laser2.wav
+share/gnukem/data/sounds/lightmag.wav
+share/gnukem/data/sounds/pickup.wav
+share/gnukem/data/sounds/sfx_weapon_singleshot7.wav
+share/gnukem/data/sounds/shoot_cg1_modified.wav
+share/gnukem/data/sounds/soft_explode.wav
+share/gnukem/data/sounds/wooeep.wav
+share/gnukem/data/sprites/
+share/gnukem/data/sprites/def0spr.dat
+share/gnukem/data/sprites/def1spr.dat
+share/gnukem/data/sprites/def2spr.dat
+share/gnukem/data/sprites/def3spr.dat
+share/gnukem/data/sprites/def4spr.dat
+share/gnukem/data/sprites/def5spr.dat
+share/gnukem/data/sprites/def6spr.dat
+share/gnukem/data/sprites/def7spr.dat
+share/gnukem/data/sprites/sprites00.tga
+share/gnukem/data/sprites/sprites01.tga
+share/gnukem/data/sprites/sprites02.tga
+share/gnukem/data/sprites/sprites03.tga
+share/gnukem/data/sprites/sprites04.tga
+share/gnukem/data/sprites/sprites05.tga
+share/gnukem/data/sprites/sprites06.tga
+share/gnukem/data/sprites/sprites07.tga
+share/gnukem/data/sprites/sprites16.tga
+share/gnukem/data/sprites/sprites16_metadata.dat
+share/gnukem/data/tog/
+share/gnukem/data/tog/tog-bg-black.tga
+share/gnukem/data/tog/tog-lev_0.lev
+share/gnukem/data/tog/tog-lev_1.lev
+share/gnukem/data/tog/tog-lev_2.lev
+share/gnukem/data/tog/tog-lev_3.lev
+share/gnukem/data/tog/tog-spr_16.bmp
+share/gnukem/data/tog/tog-spr_16.dat
+share/gnukem/data/tog/tog-spr_16.tga
+share/gnukem/data/tog/tog.gam
+share/gnukem/data/tog/zz-empty.lev
+@bin share/gnukem/davegnukem