diff --git a/src/c_cvars.cpp b/src/c_cvars.cpp
index c8f1ee4c6..18648db28 100644
--- a/src/c_cvars.cpp
+++ b/src/c_cvars.cpp
@@ -52,6 +52,10 @@
 #include "v_video.h"
 #include "colormatcher.h"
 
+// [SP] Lets the player (arbitrator) choose whether to override GetCVar checks.
+//   Danger of desync? Can we just make it a client var? This probably *fixes* desyncs, actually...
+CVAR(Bool, sv_overridegetcvar, true, CVAR_SERVERINFO | CVAR_GLOBALCONFIG | CVAR_ARCHIVE)
+
 struct FLatchedValue
 {
 	FBaseCVar *Variable;
diff --git a/src/c_cvars.h b/src/c_cvars.h
index be7676e89..d74d3b5c9 100644
--- a/src/c_cvars.h
+++ b/src/c_cvars.h
@@ -63,6 +63,7 @@ enum
 	CVAR_NOSAVE			= 4096, // when used with CVAR_SERVERINFO, do not save var to savegame
 	CVAR_MOD			= 8192,	// cvar was defined by a mod
 	CVAR_IGNORE			= 16384,// do not send cvar across the network/inaccesible from ACS (dummy mod cvar)
+	CVAR_OVERRIDEGET	= 32768,// this cvar disguises its return value for GetCVAR
 };
 
 union UCVarValue
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 1a60a0c4f..1d309307d 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -4549,6 +4549,8 @@ static void DoSetCVar(FBaseCVar *cvar, int value, bool is_string, bool force=fal
 	}
 }
 
+EXTERN_CVAR(Bool, sv_overridegetcvar)
+
 // Converts floating- to fixed-point as required.
 static int DoGetCVar(FBaseCVar *cvar, bool is_string)
 {
@@ -4558,6 +4560,24 @@ static int DoGetCVar(FBaseCVar *cvar, bool is_string)
 	{
 		return 0;
 	}
+	else if (sv_overridegetcvar && (cvar->GetFlags() & CVAR_OVERRIDEGET))
+	{
+		if (is_string)
+		{
+			val = cvar->GetGenericRepDefault(CVAR_String);
+			return GlobalACSStrings.AddString(val.String);
+		}
+		else if (cvar->GetRealType() == CVAR_Float)
+		{
+			val = cvar->GetGenericRepDefault(CVAR_Float);
+			return DoubleToACS(val.Float);
+		}
+		else
+		{
+			val = cvar->GetGenericRepDefault(CVAR_Int);
+			return val.Int;
+		}
+	}
 	else if (is_string)
 	{
 		val = cvar->GetGenericRep(CVAR_String);
diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index 73cade49a..df5852473 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -621,6 +621,8 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, GetCrouchFactor)
 //
 //==========================================================================
 
+EXTERN_CVAR(Bool, sv_overridegetcvar)
+
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, GetCVar)
 {
 	if (numret > 0)
@@ -634,6 +636,10 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, GetCVar)
 		{
 			ret->SetFloat(0);
 		}
+		else if (sv_overridegetcvar && (cvar->GetFlags() & CVAR_OVERRIDEGET))
+		{
+			ret->SetFloat(cvar->GetGenericRepDefault(CVAR_Float).Float);
+		}
 		else
 		{
 			ret->SetFloat(cvar->GetGenericRep(CVAR_Float).Float);
diff --git a/src/posix/cocoa/i_video.mm b/src/posix/cocoa/i_video.mm
index 5875e87b8..8f8cdab84 100644
--- a/src/posix/cocoa/i_video.mm
+++ b/src/posix/cocoa/i_video.mm
@@ -135,7 +135,7 @@ CUSTOM_CVAR(Bool, vid_autoswitch, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_
 
 static int s_currentRenderer;
 
-CUSTOM_CVAR(Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
+CUSTOM_CVAR(Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL | CVAR_OVERRIDEGET)
 {
 	// 0: Software renderer
 	// 1: OpenGL renderer
diff --git a/src/posix/sdl/hardware.cpp b/src/posix/sdl/hardware.cpp
index 18c7ad737..cb9a24967 100644
--- a/src/posix/sdl/hardware.cpp
+++ b/src/posix/sdl/hardware.cpp
@@ -65,7 +65,7 @@ void I_RestartRenderer();
 int currentrenderer;
 
 // [ZDoomGL]
-CUSTOM_CVAR (Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
+CUSTOM_CVAR (Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL | CVAR_OVERRIDEGET)
 {
 	// 0: Software renderer
 	// 1: OpenGL renderer
diff --git a/src/win32/hardware.cpp b/src/win32/hardware.cpp
index 609f56647..cf1ec907e 100644
--- a/src/win32/hardware.cpp
+++ b/src/win32/hardware.cpp
@@ -81,7 +81,7 @@ CUSTOM_CVAR(Bool, vid_used3d, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOIN
 }
 
 // [ZDoomGL]
-CUSTOM_CVAR (Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
+CUSTOM_CVAR (Int, vid_renderer, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL | CVAR_OVERRIDEGET)
 {
 	// 0: Software renderer
 	// 1: OpenGL renderer