diff --git a/Descent3/intellivibe.cpp b/Descent3/intellivibe.cpp
index 57780e12..21a05a4b 100644
--- a/Descent3/intellivibe.cpp
+++ b/Descent3/intellivibe.cpp
@@ -41,7 +41,6 @@
  * $NoKeywords: $
  */
 
-#define DD_ACCESS_RING
 #include "vibeinterface.h"
 
 #ifndef WIN32
diff --git a/dd_grwin32/ddgrWin32DX.cpp b/dd_grwin32/ddgrWin32DX.cpp
index ed9008f7..bf1b8ecc 100644
--- a/dd_grwin32/ddgrWin32DX.cpp
+++ b/dd_grwin32/ddgrWin32DX.cpp
@@ -33,7 +33,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h" //	Allow this module full DD access
 #include "ddgrWin32.h"
 #include "ddgrWin32DX.h"
 #include "Application.h"
diff --git a/dd_grwin32/ddgrWin32GDI.cpp b/dd_grwin32/ddgrWin32GDI.cpp
index 0417b3e7..23a9a59c 100644
--- a/dd_grwin32/ddgrWin32GDI.cpp
+++ b/dd_grwin32/ddgrWin32GDI.cpp
@@ -73,7 +73,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h" //	Allow this module full DD access
 #include "ddgrWin32.h"
 #include "ddgrWin32GDI.h"
 #include "Application.h"
diff --git a/dd_lnxsound/sdlsound.cpp b/dd_lnxsound/sdlsound.cpp
index 40866f1e..11c09296 100644
--- a/dd_lnxsound/sdlsound.cpp
+++ b/dd_lnxsound/sdlsound.cpp
@@ -16,9 +16,6 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-//	NEED THIS SINCE DDSNDLIB is a DD library.
-#include "DDAccess.h"
-
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/time.h>
diff --git a/dd_sndlib/Ds3dlib.cpp b/dd_sndlib/Ds3dlib.cpp
index decb8e92..08d930ca 100644
--- a/dd_sndlib/Ds3dlib.cpp
+++ b/dd_sndlib/Ds3dlib.cpp
@@ -203,9 +203,6 @@
  * $NoKeywords: $
  */
 
-//	NEED THIS SINCE DDSNDLIB is a DD library.
-#include "DDAccess.h"
-
 #include "ds3dlib_internal.h"
 
 #include <stdio.h>
diff --git a/dd_vidwin32/video_win32.cpp b/dd_vidwin32/video_win32.cpp
index 0efc372f..fd0c239b 100644
--- a/dd_vidwin32/video_win32.cpp
+++ b/dd_vidwin32/video_win32.cpp
@@ -47,7 +47,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h" // DD Access enabled
 
 #include "ddvidlib.h"
 #include "pserror.h"
diff --git a/ddio_lnx/lnxforcefeedback.cpp b/ddio_lnx/lnxforcefeedback.cpp
index 63894622..0cd59192 100644
--- a/ddio_lnx/lnxforcefeedback.cpp
+++ b/ddio_lnx/lnxforcefeedback.cpp
@@ -40,7 +40,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h"
 #include <stdlib.h>
 #include <stdarg.h>
 #include <math.h>
diff --git a/ddio_win/winforcefeedback.cpp b/ddio_win/winforcefeedback.cpp
index 6897c3c2..62795d21 100644
--- a/ddio_win/winforcefeedback.cpp
+++ b/ddio_win/winforcefeedback.cpp
@@ -94,7 +94,6 @@
 #include <cstdarg>
 #include <cstdio>
 
-#include "DDAccess.h"
 #include <stdlib.h>
 #include <math.h>
 
diff --git a/ddio_win/winio.cpp b/ddio_win/winio.cpp
index 1a4c2d43..76efc8fe 100644
--- a/ddio_win/winio.cpp
+++ b/ddio_win/winio.cpp
@@ -108,8 +108,6 @@
 #include <cstdarg>
 #include <cstdio>
 
-#include "DDAccess.h"
-
 #include <stdlib.h>
 
 #include "pserror.h"
diff --git a/ddio_win/winkey.cpp b/ddio_win/winkey.cpp
index db2daf79..d4d2ba24 100644
--- a/ddio_win/winkey.cpp
+++ b/ddio_win/winkey.cpp
@@ -175,7 +175,6 @@
 // ----------------------------------------------------------------------------
 //	Keyboard Interface
 // ----------------------------------------------------------------------------
-#include "DDAccess.h"
 
 #include "pserror.h"
 #include "mono.h"
diff --git a/ddio_win/winmouse.cpp b/ddio_win/winmouse.cpp
index 91bbff55..ce3c4117 100644
--- a/ddio_win/winmouse.cpp
+++ b/ddio_win/winmouse.cpp
@@ -23,7 +23,6 @@
 #include <stdlib.h>
 #include <math.h>
 
-#include "DDAccess.h"
 #include "pserror.h"
 #include "mono.h"
 #include "ddio.h"
diff --git a/lib/DDAccess.h b/lib/DDAccess.h
deleted file mode 100644
index 6e27acc2..00000000
--- a/lib/DDAccess.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
-* Descent 3 
-* Copyright (C) 2024 Parallax Software
-*
-* This program 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, either version 3 of the License, or
-* (at your option) any later version.
-*
-* This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
-
---- HISTORICAL COMMENTS FOLLOW ---
-
- * $Logfile: /DescentIII/Main/lib/DDAccess.h $
- * $Revision: 3 $
- * $Date: 8/13/97 3:02p $
- * $Author: Samir $
- *
- * Device Dependant Access Manager.  (Allow access of libraries to OS information)
- *
- * $Log: /DescentIII/Main/lib/DDAccess.h $
- *
- * 3     8/13/97 3:02p Samir
- * A 'cleaner' way to do DirectInput mouse stuff.
- *
- * 2     8/01/97 7:31p Samir
- * Slightly better interface.
- *
- * 1     5/23/97 4:07p Samir
- * Device Dependant Data Access Manager.
- *
- * $NoKeywords: $
- */
-
-#ifndef DDACCESS_H
-#define DDACCESS_H
-
-//	allows access to DD system information, such as OS specific info.
-
-#define DD_ACCESS_RING
-
-//	Win32 region of DD_ACCESS
-//		Include the standard windows header since API calls are available in DD_ACCESS_RING
-//		Define any additional messages too.
-
-#if defined(WIN32)
-
-//	Messages
-#define WM_SYNCMOUSEACQUIRE (WM_USER + 0)
-
-#endif // WIN32
-
-#endif
diff --git a/lib/Ddgr.h b/lib/Ddgr.h
index 8762e0e3..9fab6ddb 100644
--- a/lib/Ddgr.h
+++ b/lib/Ddgr.h
@@ -172,7 +172,6 @@ typedef struct ddgr_surface {
   int locks;               // lock count.
 } ddgr_surface;
 
-#if defined(DD_ACCESS_RING) // only available to DD_ACCESS libraries.
 #if defined(WIN32)
 /*
         ddraw_surf = true	if this is a true DirectDraw surface, false if a GDI surface
@@ -183,7 +182,6 @@ void ddgr_surf_GetPrivateData(ddgr_surface *sf, bool *ddraw_surf, uint *object_p
 //	you must typecase this return value to LPDIRECTDRAW
 unsigned ddgr_GetDDrawObject();
 #endif // WIN32
-#endif // DD_ACCESS_RING
 
 /*	Surface Functions
  */
diff --git a/lib/TaskSystem.h b/lib/TaskSystem.h
index 44c8d6fd..9381c4f7 100644
--- a/lib/TaskSystem.h
+++ b/lib/TaskSystem.h
@@ -50,11 +50,7 @@ typedef enum tTaskPriority { TASKPRIORITY_HIGHEST, TASKPRIORITY_NORMAL, TASKPRIO
 //	handle multitasking differently.
 
 class osEvent {
-#if defined(DD_ACCESS_RING)
 public:
-#else
-private:
-#endif // DD_ACCESS_RING_0
 #if defined(WIN32)
   unsigned event_os_handle; // this is the Win32 Event Handle
 #endif                      // WIN32
@@ -71,11 +67,7 @@ public:
 };
 
 class osTask {
-#if defined(DD_ACCESS_RING)
 public:
-#else
-private:
-#endif // DD_ACCESS_RING_0
 #if defined(WIN32)
   unsigned task_os_handle; // This is the Win32 EventHandle
   unsigned task_os_id;     // Win32 Thread ID
diff --git a/lib/renderer.h b/lib/renderer.h
index 56a9423b..8ea7b4c5 100644
--- a/lib/renderer.h
+++ b/lib/renderer.h
@@ -680,11 +680,9 @@ void rend_CopyBitmapToFramebuffer(int bm_handle, int x, int y);
 // Gets a renderer ready for a framebuffer copy, or stops a framebuffer copy
 void rend_SetFrameBufferCopyState(bool state);
 
-#if defined(DD_ACCESS_RING)
 #if defined(WIN32)
 // returns the direct draw object
 void *rend_RetrieveDirectDrawObj(void **frontsurf, void **backsurf);
 #endif
-#endif
 
 #endif
diff --git a/lib/win/win32app.h b/lib/win/win32app.h
index 04b4702b..5bf1020e 100644
--- a/lib/win/win32app.h
+++ b/lib/win/win32app.h
@@ -212,12 +212,7 @@ public:
   // detect if application can handle what we want of it.
   static bool GetSystemSpecs(const char *fname);
 
-//	These variables are only accessable to modules that have DD_ACCESS.
-#if defined(DD_ACCESS_RING)
 public:
-#else
-protected:
-#endif
   HWnd m_hWnd; // handles created by the system
   HInstance m_hInstance;
   unsigned m_Flags;
@@ -227,11 +222,7 @@ private:
   void os_init(); // initializes OS components.
 };
 
-// the following data is communicated by the application library to other DDAccessed libraries.
-#if defined(DD_ACCESS_RING)
-
 // system mouse info.
 extern short w32_msewhl_delta; // value of mouse wheel delta for frame
 
 #endif
-#endif
diff --git a/linux/lnxcon.cpp b/linux/lnxcon.cpp
index f75abb4f..a0deaf0a 100644
--- a/linux/lnxcon.cpp
+++ b/linux/lnxcon.cpp
@@ -56,7 +56,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h"
 #include "application.h"
 #include "AppConsole.h"
 #include "TaskSystem.h"
diff --git a/linux/lnxcon_null.cpp b/linux/lnxcon_null.cpp
index 82f5625a..5aa5517e 100644
--- a/linux/lnxcon_null.cpp
+++ b/linux/lnxcon_null.cpp
@@ -45,7 +45,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h"
 #include "application.h"
 #include "AppConsole.h"
 #include "TaskSystem.h"
diff --git a/linux/lnxcon_raw.cpp b/linux/lnxcon_raw.cpp
index ab6f3e6d..756d5b7b 100644
--- a/linux/lnxcon_raw.cpp
+++ b/linux/lnxcon_raw.cpp
@@ -39,7 +39,6 @@
  * $NoKeywords: $
  */
 
-#include "DDAccess.h"
 #include "application.h"
 #include "AppConsole.h"
 #include "TaskSystem.h"
diff --git a/movie/d3movie.cpp b/movie/d3movie.cpp
index 782ba8ef..d0201b88 100644
--- a/movie/d3movie.cpp
+++ b/movie/d3movie.cpp
@@ -26,7 +26,6 @@
 #define O_BINARY 0
 #endif
 
-#include "DDAccess.h"
 
 #ifdef WIN32
 #include <windows.h>
diff --git a/renderer/HardwareOpenGL.cpp b/renderer/HardwareOpenGL.cpp
index 6d94fb0b..56fc968e 100644
--- a/renderer/HardwareOpenGL.cpp
+++ b/renderer/HardwareOpenGL.cpp
@@ -25,7 +25,6 @@
 #else
 #endif
 
-#include "DDAccess.h"
 #include "pstypes.h"
 #include "pserror.h"
 #include "mono.h"
diff --git a/win32/wincon.cpp b/win32/wincon.cpp
index 6dbb54bc..abaec4c6 100644
--- a/win32/wincon.cpp
+++ b/win32/wincon.cpp
@@ -67,7 +67,6 @@
 #include <cstdarg>
 #include <cstdio>
 
-#include "DDAccess.h"
 #include "Application.h"
 #include "AppConsole.h"
 #include "TaskSystem.h"
diff --git a/win32/wintask.cpp b/win32/wintask.cpp
index 90fc4370..b536b431 100644
--- a/win32/wintask.cpp
+++ b/win32/wintask.cpp
@@ -44,9 +44,6 @@
  * $NoKeywords: $
  */
 
-//	Allow Full DD system access.
-#include "DDAccess.h"
-
 //	Library includes
 #include "TaskSystem.h"
 #include "pserror.h"