diff --git a/src/Makefile.d/detect.mk b/src/Makefile.d/detect.mk
index f458b044c..f84cd2942 100644
--- a/src/Makefile.d/detect.mk
+++ b/src/Makefile.d/detect.mk
@@ -6,7 +6,6 @@
 	PANDORA\
 	HAIKU\
 	DUMMY\
-	DJGPPDOS\
 	SOLARIS\
 	MACOSX\
 
diff --git a/src/console.c b/src/console.c
index 7cbcb85a9..08d04e318 100644
--- a/src/console.c
+++ b/src/console.c
@@ -35,10 +35,6 @@
 #include "filesrch.h"
 #include "m_misc.h"
 
-#ifdef _WINDOWS
-#include "win32/win_main.h"
-#endif
-
 #ifdef HWRENDER
 #include "hardware/hw_main.h"
 #endif
@@ -1550,13 +1546,6 @@ void CONS_Debug(INT32 debugflags, const char *fmt, ...)
 //
 void CONS_Error(const char *msg)
 {
-#if defined(RPC_NO_WINDOWS_H) && defined(_WINDOWS)
-	if (!graphics_started)
-	{
-		MessageBoxA(vid.WndParent, msg, "Dr. Robotnik's Ring Racers Warning", MB_OK);
-		return;
-	}
-#endif
 	CONS_Printf("\x82%s", msg); // write error msg in different colour
 	CONS_Printf(M_GetText("Press ENTER to continue\n"));
 
diff --git a/src/d_main.c b/src/d_main.c
index d6dcfbcab..0fc8fc60c 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -85,10 +85,6 @@
 #include "hardware/hw_main.h" // 3D View Rendering
 #endif
 
-#ifdef _WINDOWS
-#include "win32/win_main.h" // I_DoStartupMouse
-#endif
-
 #ifdef HW3SOUND
 #include "hardware/hw3sound.h"
 #endif
@@ -714,11 +710,6 @@ void D_SRB2Loop(void)
 
 	// Pushing of + parameters is now done back in D_SRB2Main, not here.
 
-#ifdef _WINDOWS
-	CONS_Printf("I_StartupMouse()...\n");
-	I_DoStartupMouse();
-#endif
-
 	I_UpdateTime(cv_timescale.value);
 	oldentertics = I_GetTime();
 
@@ -1258,9 +1249,7 @@ void D_SRB2Main(void)
 #endif
 
 	// for dedicated server
-#if !defined (_WINDOWS) //already check in win_main.c
 	dedicated = M_CheckParm("-dedicated") != 0;
-#endif
 
 	if (devparm)
 		CONS_Printf(M_GetText("Development mode ON.\n"));
diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index 08937cd53..56e78a1a5 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -4708,8 +4708,6 @@ static void Command_Version_f(void)
 	// Base library
 #if defined( HAVE_SDL)
 	CONS_Printf("SDL ");
-#elif defined(_WINDOWS)
-	CONS_Printf("DD ");
 #endif
 
 	// OS
diff --git a/src/d_netfil.c b/src/d_netfil.c
index 7add20feb..3de3a0030 100644
--- a/src/d_netfil.c
+++ b/src/d_netfil.c
@@ -15,7 +15,7 @@
 
 #include <time.h>
 
-#if defined (_WIN32) || defined (__DJGPP__)
+#ifdef _WIN32
 #include <io.h>
 #include <direct.h>
 #else
@@ -30,10 +30,6 @@
 #elif defined (_WIN32)
 #include <sys/utime.h>
 #endif
-#ifdef __DJGPP__
-#include <dir.h>
-#include <utime.h>
-#endif
 
 #ifdef HAVE_CURL
 #include "curl/curl.h"
diff --git a/src/doomdef.h b/src/doomdef.h
index d7c77588f..8ba2689ad 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -55,12 +55,6 @@
 #endif
 #endif
 
-#ifdef _WINDOWS
-#if !defined (HWRENDER) && !defined (NOHW)
-#define HWRENDER
-#endif
-#endif
-
 #ifdef _WIN32
 #define ASMCALL __cdecl
 #else
@@ -99,7 +93,7 @@
 #include <sys/stat.h>
 #include <ctype.h>
 
-#if defined (_WIN32) || defined (__DJGPP__)
+#ifdef _WIN32
 #include <io.h>
 #endif
 
diff --git a/src/doomtype.h b/src/doomtype.h
index 5d14fceae..4aabab8b0 100644
--- a/src/doomtype.h
+++ b/src/doomtype.h
@@ -54,17 +54,6 @@ typedef long ssize_t;
 		#define PDWORD_PTR PDWORD
 	#endif
 #endif
-#elif defined (__DJGPP__)
-#define UINT8 unsigned char
-#define SINT8 signed char
-
-#define UINT16 unsigned short int
-#define INT16 signed short int
-
-#define INT32 signed long
-#define UINT32 unsigned long
-#define INT64  signed long long
-#define UINT64 unsigned long long
 #else
 #define __STDC_LIMIT_MACROS
 #include <stdint.h>
diff --git a/src/hardware/hw_dll.h b/src/hardware/hw_dll.h
index d22c8c312..80ff590b5 100644
--- a/src/hardware/hw_dll.h
+++ b/src/hardware/hw_dll.h
@@ -20,18 +20,10 @@
 // __declspec(dllexport) <return->type> (WINAPI *<function-name>) (<arguments>);
 
 #ifdef _CREATE_DLL_
- #ifdef _WINDOWS
-  #ifdef __cplusplus
-   #define EXPORT  extern "C" __declspec(dllexport)
-  #else
-   #define EXPORT  __declspec(dllexport)
-  #endif
+ #ifdef __cplusplus
+  #define EXPORT  extern "C"
  #else
-  #ifdef __cplusplus
-   #define EXPORT  extern "C"
-  #else
-   #define EXPORT
-  #endif
+  #define EXPORT
  #endif
  #ifdef _WIN32
   #define HWRAPI(fn)  WINAPI fn
@@ -56,9 +48,7 @@
 
 void GL_DBG_Printf(const char *format, ...) /*FUNCPRINTF*/;
 
-#ifdef _WINDOWS
-BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
-#elif defined (__CYGWIN__)
+#ifdef __CYGWIN__
 void _init() __attribute__((constructor));
 void _fini() __attribute__((destructor));
 #else
diff --git a/src/hardware/hw_drv.h b/src/hardware/hw_drv.h
index 808afd701..7e808ef58 100644
--- a/src/hardware/hw_drv.h
+++ b/src/hardware/hw_drv.h
@@ -29,9 +29,6 @@ EXPORT boolean HWRAPI(Init) (void);
 #ifndef HAVE_SDL
 EXPORT void HWRAPI(Shutdown) (void);
 #endif
-#ifdef _WINDOWS
-EXPORT void HWRAPI(GetModeList) (vmode_t **pvidmodes, INT32 *numvidmodes);
-#endif
 EXPORT void HWRAPI(SetPalette) (RGBA_t *ppal);
 EXPORT void HWRAPI(FinishUpdate) (INT32 waitvbl);
 EXPORT void HWRAPI(Draw2DLine) (F2DCoord *v1, F2DCoord *v2, RGBA_t Color);
@@ -104,9 +101,6 @@ struct hwdriver_s
 	CreateModelVBOs     pfnCreateModelVBOs;
 	SetTransform        pfnSetTransform;
 	GetTextureUsed      pfnGetTextureUsed;
-#ifdef _WINDOWS
-	GetModeList         pfnGetModeList;
-#endif
 #ifndef HAVE_SDL
 	Shutdown            pfnShutdown;
 #endif
diff --git a/src/i_addrinfo.c b/src/i_addrinfo.c
index 36633cfa3..e8bff686b 100644
--- a/src/i_addrinfo.c
+++ b/src/i_addrinfo.c
@@ -20,10 +20,6 @@
 #else
 #include <winsock.h>
 #endif
-#elif !defined (__DJGPP__)
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <netdb.h>
 #endif
 
 #include "i_addrinfo.h"
diff --git a/src/i_tcp.c b/src/i_tcp.c
index 2de24a3a4..d99029b44 100644
--- a/src/i_tcp.c
+++ b/src/i_tcp.c
@@ -100,15 +100,6 @@
 	#endif
 #endif // USE_WINSOCK
 
-#ifdef __DJGPP__
-	#ifdef WATTCP // Alam_GBC: Wattcp may need this
-		#include <tcp.h>
-		#define strerror strerror_s
-	#else // wattcp
-		#include <lsck/lsck.h>
-	#endif // libsocket
-#endif // djgpp
-
 typedef union
 {
 	struct sockaddr     any;
@@ -142,7 +133,7 @@ typedef union
 #include "doomstat.h"
 
 // win32 or djgpp
-#if defined (USE_WINSOCK) || defined (__DJGPP__)
+#ifdef USE_WINSOCK
 	// winsock stuff (in winsock a socket is not a file)
 	#define ioctl ioctlsocket
 	#define close closesocket
@@ -150,15 +141,7 @@ typedef union
 
 #include "i_addrinfo.h"
 
-#ifdef __DJGPP__
-
-#ifdef WATTCP
 #define SELECTTEST
-#endif
-
-#else
-#define SELECTTEST
-#endif
 
 #define DEFAULTPORT "5029"
 
@@ -174,8 +157,8 @@ typedef union
 	#define ERRSOCKET (-1)
 #endif
 
-// define socklen_t in DOS/Windows if it is not already defined
-#if (defined (WATTCP) && !defined (__libsocket_socklen_t)) || defined (USE_WINSOCK1)
+// define socklen_t in Windows if it is not already defined
+#ifdef USE_WINSOCK1
 	typedef int socklen_t;
 #endif
 
@@ -208,18 +191,6 @@ static boolean init_tcp_driver = false;
 static const char *serverport_name = DEFAULTPORT;
 static const char *clientport_name;/* any port */
 
-#ifdef WATTCP
-static void wattcp_outch(char s)
-{
-	static char old = '\0';
-	char pr[2] = {s,0};
-	if (s == old && old == ' ') return;
-	else old = s;
-	if (s == '\r') CONS_Printf("\n");
-	else if (s != '\n') CONS_Printf(pr);
-}
-#endif
-
 #ifdef USE_WINSOCK
 // stupid microsoft makes things complicated
 static char *get_WSAErrorStr(int e)
@@ -820,11 +791,7 @@ static SOCKET_TYPE UDP_Bind(int family, struct sockaddr *addr, socklen_t addrlen
 	int opt;
 	socklen_t opts;
 #ifdef FIONBIO
-#ifdef WATTCP
-	char trueval = true;
-#else
 	unsigned long trueval = true;
-#endif
 #endif
 	mysockaddr_t straddr;
 	struct sockaddr_in sin;
@@ -1192,61 +1159,7 @@ boolean I_InitTcpDriver(void)
 		CONS_Debug(DBG_NETPLAY, "WinSock description: %s\n",WSAData.szDescription);
 		CONS_Debug(DBG_NETPLAY, "WinSock System Status: %s\n",WSAData.szSystemStatus);
 #endif
-#ifdef __DJGPP__
-#ifdef WATTCP // Alam_GBC: survive bootp, dhcp, rarp and wattcp/pktdrv from failing to load
-		survive_eth   = 1; // would be needed to not exit if pkt_eth_init() fails
-		survive_bootp = 1; // ditto for BOOTP
-		survive_dhcp  = 1; // ditto for DHCP/RARP
-		survive_rarp  = 1;
-		//_watt_do_exit = false;
-		//_watt_handle_cbreak = false;
-		//_watt_no_config = true;
-		_outch = wattcp_outch;
-		init_misc();
-//#ifdef DEBUGFILE
-		dbug_init();
-//#endif
-		switch (sock_init())
-		{
-			case 0:
-				init_tcp_driver = true;
-				break;
-			case 3:
-				CONS_Debug(DBG_NETPLAY, "No packet driver detected\n");
-				break;
-			case 4:
-				CONS_Debug(DBG_NETPLAY, "Error while talking to packet driver\n");
-				break;
-			case 5:
-				CONS_Debug(DBG_NETPLAY, "BOOTP failed\n");
-				break;
-			case 6:
-				CONS_Debug(DBG_NETPLAY, "DHCP failed\n");
-				break;
-			case 7:
-				CONS_Debug(DBG_NETPLAY, "RARP failed\n");
-				break;
-			case 8:
-				CONS_Debug(DBG_NETPLAY, "TCP/IP failed\n");
-				break;
-			case 9:
-				CONS_Debug(DBG_NETPLAY, "PPPoE login/discovery failed\n");
-				break;
-			default:
-				CONS_Debug(DBG_NETPLAY, "Unknown error with TCP/IP stack\n");
-				break;
-		}
-		hires_timer(0);
-#else // wattcp
-		if (__lsck_init())
-			init_tcp_driver = true;
-		else
-			CONS_Debug(DBG_NETPLAY, "No TCP/IP driver detected\n");
-#endif // libsocket
-#endif // __DJGPP__
-#ifndef __DJGPP__
 		init_tcp_driver = true;
-#endif
 	}
 	if (!tcp_was_up && init_tcp_driver)
 	{
@@ -1269,10 +1182,8 @@ static void SOCK_CloseSocket(void)
 		if (mysockets[i] != (SOCKET_TYPE)ERRSOCKET
 		 && FD_ISSET(mysockets[i], &masterset))
 		{
-#if !defined (__DJGPP__) || defined (WATTCP)
 			FD_CLR(mysockets[i], &masterset);
 			close(mysockets[i]);
-#endif
 		}
 		mysockets[i] = ERRSOCKET;
 	}
@@ -1287,14 +1198,6 @@ void I_ShutdownTcpDriver(void)
 	WS_addrinfocleanup();
 	WSACleanup();
 #endif
-#ifdef __DJGPP__
-#ifdef WATTCP // wattcp
-	//_outch = NULL;
-	sock_exit();
-#else
-	__lsck_uninit();
-#endif // libsocket
-#endif // __DJGPP__
 	CONS_Printf("shut down\n");
 	init_tcp_driver = false;
 }
diff --git a/src/k_menufunc.c b/src/k_menufunc.c
index 2fceb77c8..144bc4525 100644
--- a/src/k_menufunc.c
+++ b/src/k_menufunc.c
@@ -4581,16 +4581,8 @@ void M_VideoModeMenu(INT32 choice)
 	optionsmenu.vidm_selected = 0;
 	nummodes = VID_NumModes();
 
-#ifdef _WINDOWS
-	// clean that later: skip windowed mode 0, video modes menu only shows FULL SCREEN modes
-	if (nummodes <= NUMSPECIALMODES)
-		i = 0; // unless we have nothing
-	else
-		i = NUMSPECIALMODES;
-#else
 	// DOS does not skip mode 0, because mode 0 is ALWAYS present
 	i = 0;
-#endif
 	for (; i < nummodes && optionsmenu.vidm_nummodes < MAXMODEDESCS; i++)
 	{
 		desc = VID_GetModeName(i);
diff --git a/src/m_fixed.h b/src/m_fixed.h
index 021f84d89..fd8e79b94 100644
--- a/src/m_fixed.h
+++ b/src/m_fixed.h
@@ -77,7 +77,7 @@ FUNCMATH FUNCINLINE static ATTRINLINE fixed_t FloatToFixed(float f)
 		value   [eax]       \
 		modify exact [eax edx]
 #elif defined (__GNUC__) && defined (__i386__) && !defined (NOASM)
-	// DJGPP, i386 linux, cygwin or mingw
+	// i386 linux, cygwin or mingw
 	FUNCMATH FUNCINLINE static inline fixed_t FixedMul(fixed_t a, fixed_t b) // asm
 	{
 		fixed_t ret;
diff --git a/src/m_misc.c b/src/m_misc.c
index 0628ef3b6..d64c620df 100644
--- a/src/m_misc.c
+++ b/src/m_misc.c
@@ -72,8 +72,6 @@ typedef off_t off64_t;
 #else
 #define PRIdS "u"
 #endif
-#elif defined (DJGPP)
-#define PRIdS "u"
 #else
 #define PRIdS "zu"
 #endif
@@ -930,8 +928,6 @@ static void M_PNGText(png_structp png_ptr, png_infop png_info_ptr, PNG_CONST png
 	char interfacetxt[] =
 #ifdef HAVE_SDL
 	 "SDL";
-#elif defined (_WINDOWS)
-	 "DirectX";
 #else
 	 "Unknown";
 #endif
diff --git a/src/s_sound.c b/src/s_sound.c
index 12e35e5c5..c1255e69e 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -62,15 +62,7 @@ static lumpnum_t S_GetMusicLumpNum(const char *mname);
 
 static boolean S_CheckQueue(void);
 
-#if defined (_WINDOWS) && !defined (SURROUND) //&& defined (_X86_)
-#define SURROUND
-#endif
-
-#ifdef _WINDOWS
-consvar_t cv_samplerate = CVAR_INIT ("samplerate", "44100", 0, CV_Unsigned, NULL); //Alam: For easy hacking?
-#else
 consvar_t cv_samplerate = CVAR_INIT ("samplerate", "22050", 0, CV_Unsigned, NULL); //Alam: For easy hacking?
-#endif
 
 // stereo reverse
 consvar_t stereoreverse = CVAR_INIT ("stereoreverse", "Off", CV_SAVE, CV_OnOff, NULL);
@@ -996,11 +988,9 @@ void S_SetSfxVolume(INT32 volume)
 
 void S_ClearSfx(void)
 {
-#ifndef DJGPPDOS
 	size_t i;
 	for (i = 1; i < NUMSFX; i++)
 		I_FreeSfx(S_sfx + i);
-#endif
 }
 
 static void S_StopChannel(INT32 cnum)