diff --git a/doomsday/apps/plugins/common/include/p_user.h b/doomsday/apps/plugins/common/include/p_user.h
index c2f3d77ac8..8a6c7ccc1d 100644
--- a/doomsday/apps/plugins/common/include/p_user.h
+++ b/doomsday/apps/plugins/common/include/p_user.h
@@ -25,11 +25,11 @@
 
 #include "dd_types.h"
 
-#define PLAYER_REBORN_TICS      (1*TICSPERSEC)
+#define PLAYER_REBORN_TICS (1 * TICSPERSEC)
 
 DENG_EXTERN_C dd_bool onground;
-
-DENG_EXTERN_C int maxHealth;
+DENG_EXTERN_C float   turboMul; // Multiplier for running speed.
+DENG_EXTERN_C int     maxHealth;
 
 #if __JDOOM__ || __JDOOM64__
 DENG_EXTERN_C int healthLimit;
diff --git a/doomsday/apps/plugins/common/src/game/g_game.cpp b/doomsday/apps/plugins/common/src/game/g_game.cpp
index 1956b99a28..1b95d27e2e 100644
--- a/doomsday/apps/plugins/common/src/game/g_game.cpp
+++ b/doomsday/apps/plugins/common/src/game/g_game.cpp
@@ -801,6 +801,25 @@ void G_CommonPostInit()
     G_RegisterCheats();
 #endif
 
+    // Change the turbo multiplier.
+    {
+        auto &cmdLine = CommandLine::get();
+
+        turboMul = 1.0f;
+        if (int arg = cmdLine.check("-turbo"))
+        {
+            int scale = 200; // Default to 2x without a numeric value.
+
+            if (arg + 1 < cmdLine.count() && !cmdLine.isOption(arg + 1))
+            {
+                scale = cmdLine.at(arg + 1).toInt();
+            }
+            scale = de::clamp(10, scale, 400);
+            turboMul = scale / 100.f;
+            LOG_NOTE("Turbo speed: %i%%") << scale;
+        }
+    }
+
     // From this point on, the shortcuts are always active.
     DD_Execute(true, "activatebcontext shortcut");
 
diff --git a/doomsday/apps/plugins/common/src/p_user.c b/doomsday/apps/plugins/common/src/p_user.c
index c8e4276775..1bc75991b8 100644
--- a/doomsday/apps/plugins/common/src/p_user.c
+++ b/doomsday/apps/plugins/common/src/p_user.c
@@ -57,6 +57,7 @@
 #define ANG5                (ANG90/18)
 
 dd_bool onground;
+float   turboMul = 1.0f; // Multiplier for running speed.
 
 int maxHealth; // 100
 #if __JDOOM__ || __JDOOM64__
diff --git a/doomsday/apps/plugins/doom/include/d_main.h b/doomsday/apps/plugins/doom/include/d_main.h
index 7d4ff16132..981a2a0e5e 100644
--- a/doomsday/apps/plugins/doom/include/d_main.h
+++ b/doomsday/apps/plugins/doom/include/d_main.h
@@ -27,8 +27,6 @@
 
 #include "doomdef.h"
 
-DENG_EXTERN_C float turboMul; // Multiplier for turbo.
-
 DENG_EXTERN_C gamemode_t gameMode;
 DENG_EXTERN_C int gameModeBits;
 
diff --git a/doomsday/apps/plugins/doom/include/p_local.h b/doomsday/apps/plugins/doom/include/p_local.h
index 8da1d71371..8bd3bad884 100644
--- a/doomsday/apps/plugins/doom/include/p_local.h
+++ b/doomsday/apps/plugins/doom/include/p_local.h
@@ -77,7 +77,6 @@
 
 #define sentient(mobj)      ((mobj)->health > 0 && P_GetState((mobj)->type, SN_SEE))
 
-DENG_EXTERN_C float turboMul;
 DENG_EXTERN_C int maxAmmo[NUM_AMMO_TYPES];
 DENG_EXTERN_C int clipAmmo[NUM_AMMO_TYPES];
 
diff --git a/doomsday/apps/plugins/doom/src/d_main.cpp b/doomsday/apps/plugins/doom/src/d_main.cpp
index fd740a57d5..ffd0ceaf8d 100644
--- a/doomsday/apps/plugins/doom/src/d_main.cpp
+++ b/doomsday/apps/plugins/doom/src/d_main.cpp
@@ -39,8 +39,6 @@
 using namespace de;
 using namespace common;
 
-float turboMul; // Multiplier for turbo.
-
 gamemode_t gameMode;
 int gameModeBits;
 
@@ -441,21 +439,6 @@ void D_PostInit()
         }
     }
 
-    // Change the turbo multiplier?
-    ::turboMul = 1.0f;
-    if (int arg = cmdLine.check("-turbo"))
-    {
-        int scale = 200;
-        if (arg + 1 < cmdLine.count() && !cmdLine.isOption(arg + 1))
-        {
-            scale = cmdLine.at(arg + 1).toInt();
-        }
-        scale = de::clamp(10, scale, 400);
-
-        LOG_NOTE("Turbo scale: %i%%") << scale;
-        ::turboMul = scale / 100.f;
-    }
-
     // Load a saved game?
     if (int arg = cmdLine.check("-loadgame", 1))
     {
diff --git a/doomsday/apps/plugins/doom64/include/d_main.h b/doomsday/apps/plugins/doom64/include/d_main.h
index a31168593f..6d38480ef1 100644
--- a/doomsday/apps/plugins/doom64/include/d_main.h
+++ b/doomsday/apps/plugins/doom64/include/d_main.h
@@ -27,8 +27,6 @@
 
 #include "doomdef.h"
 
-DENG_EXTERN_C float turboMul; // Multiplier for turbo.
-
 DENG_EXTERN_C gamemode_t gameMode;
 DENG_EXTERN_C int gameModeBits;
 
diff --git a/doomsday/apps/plugins/doom64/src/d_main.cpp b/doomsday/apps/plugins/doom64/src/d_main.cpp
index 8f164626a0..bf28df9fc5 100644
--- a/doomsday/apps/plugins/doom64/src/d_main.cpp
+++ b/doomsday/apps/plugins/doom64/src/d_main.cpp
@@ -40,8 +40,6 @@
 using namespace de;
 using namespace common;
 
-float turboMul; // Multiplier for turbo.
-
 gamemode_t gameMode;
 int gameModeBits;
 
@@ -363,21 +361,6 @@ void D_PostInit()
         }
     }
 
-    // Change the turbo multiplier?
-    ::turboMul = 1.0f;
-    if(int arg = cmdLine.check("-turbo"))
-    {
-        int scale = 200;
-        if(arg + 1 < cmdLine.count() && !cmdLine.isOption(arg + 1))
-        {
-            scale = cmdLine.at(arg + 1).toInt();
-        }
-        scale = de::clamp(10, scale, 400);
-
-        LOG_NOTE("Turbo scale: %i%%") << scale;
-        ::turboMul = scale / 100.f;
-    }
-
     // Load a saved game?
     if(int arg = cmdLine.check("-loadgame", 1))
     {
diff --git a/doomsday/apps/plugins/heretic/include/h_main.h b/doomsday/apps/plugins/heretic/include/h_main.h
index c8971eab02..4acd558f5c 100644
--- a/doomsday/apps/plugins/heretic/include/h_main.h
+++ b/doomsday/apps/plugins/heretic/include/h_main.h
@@ -27,8 +27,6 @@
 
 #include "doomdef.h"
 
-DENG_EXTERN_C float turboMul; // Multiplier for turbo.
-
 DENG_EXTERN_C gamemode_t gameMode;
 DENG_EXTERN_C int gameModeBits;
 
diff --git a/doomsday/apps/plugins/heretic/include/p_local.h b/doomsday/apps/plugins/heretic/include/p_local.h
index cfaf28bc58..ef23425204 100644
--- a/doomsday/apps/plugins/heretic/include/p_local.h
+++ b/doomsday/apps/plugins/heretic/include/p_local.h
@@ -94,7 +94,6 @@
 #define USE_MACE_AMMO_2 5
 
 DENG_EXTERN_C mobj_t *missileMobj;
-DENG_EXTERN_C float turboMul;
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/doomsday/apps/plugins/heretic/src/h_main.cpp b/doomsday/apps/plugins/heretic/src/h_main.cpp
index ae80d34253..777c438329 100644
--- a/doomsday/apps/plugins/heretic/src/h_main.cpp
+++ b/doomsday/apps/plugins/heretic/src/h_main.cpp
@@ -40,8 +40,6 @@
 using namespace de;
 using namespace common;
 
-float turboMul; // Multiplier for turbo.
-
 gamemode_t gameMode;
 int gameModeBits;
 
@@ -383,21 +381,6 @@ void H_PostInit()
     gfw_SetDefaultRule(noMonsters,      cmdLine.check("-nomonsters")? true : false);
     gfw_SetDefaultRule(respawnMonsters, cmdLine.check("-respawn")   ? true : false);
 
-    // Change the turbo multiplier?
-    ::turboMul = 1.0f;
-    if (int arg = cmdLine.check("-turbo"))
-    {
-        int scale = 200;
-        if (arg + 1 < cmdLine.count() && !cmdLine.isOption(arg + 1))
-        {
-            scale = cmdLine.at(arg + 1).toInt();
-        }
-        scale = de::clamp(10, scale, 400);
-
-        LOG_NOTE("Turbo scale: %i%%") << scale;
-        ::turboMul = scale / 100.f;
-    }
-
     // Load a saved game?
     if (auto arg = cmdLine.check("-loadgame", 1))
     {
diff --git a/doomsday/apps/plugins/hexen/include/x_main.h b/doomsday/apps/plugins/hexen/include/x_main.h
index 7a00e19b3f..505c2303e3 100644
--- a/doomsday/apps/plugins/hexen/include/x_main.h
+++ b/doomsday/apps/plugins/hexen/include/x_main.h
@@ -27,8 +27,6 @@
 
 #include "h2def.h"
 
-DENG_EXTERN_C float turboMul; // Multiplier for turbo.
-
 DENG_EXTERN_C gamemode_t gameMode;
 DENG_EXTERN_C int gameModeBits;
 
diff --git a/doomsday/apps/plugins/hexen/src/h2_main.cpp b/doomsday/apps/plugins/hexen/src/h2_main.cpp
index 62c67f830d..75cc2d227b 100644
--- a/doomsday/apps/plugins/hexen/src/h2_main.cpp
+++ b/doomsday/apps/plugins/hexen/src/h2_main.cpp
@@ -43,8 +43,6 @@
 using namespace de;
 using namespace common;
 
-float turboMul; // Multiplier for turbo.
-
 gamemode_t gameMode;
 int gameModeBits;
 
@@ -317,21 +315,6 @@ void X_PostInit()
     gfw_SetDefaultRule(noMonsters,    cmdLine.check("-nomonsters")? true : false);
     gfw_SetDefaultRule(randomClasses, cmdLine.check("-randclass") ? true : false);
 
-    // Change the turbo multiplier?
-    ::turboMul = 1.0f;
-    if (int arg = cmdLine.check("-turbo"))
-    {
-        int scale = 200;
-        if (arg + 1 < cmdLine.count() && !cmdLine.isOption(arg + 1))
-        {
-            scale = cmdLine.at(arg + 1).toInt();
-        }
-        scale = de::clamp(10, scale, 400);
-
-        LOG_NOTE("Turbo scale: %i%%") << scale;
-        ::turboMul = scale / 100.f;
-    }
-
     // Process sound definitions.
     SndInfoParser(AutoStr_FromText("Lumps:SNDINFO"));