diff --git a/Source/Core/Core/BootManager.cpp b/Source/Core/Core/BootManager.cpp
index f9848189f8..4233ca6393 100644
--- a/Source/Core/Core/BootManager.cpp
+++ b/Source/Core/Core/BootManager.cpp
@@ -334,20 +334,21 @@ bool BootCore(std::unique_ptr<BootParameters> boot)
 
   if (NetPlay::IsNetPlayRunning())
   {
-    Config::AddLayer(ConfigLoaders::GenerateNetPlayConfigLoader(g_NetPlaySettings));
-    StartUp.bCPUThread = g_NetPlaySettings.m_CPUthread;
-    StartUp.bEnableCheats = g_NetPlaySettings.m_EnableCheats;
-    StartUp.bDSPHLE = g_NetPlaySettings.m_DSPHLE;
-    StartUp.bEnableMemcardSdWriting = g_NetPlaySettings.m_WriteToMemcard;
-    StartUp.bCopyWiiSaveNetplay = g_NetPlaySettings.m_CopyWiiSave;
-    StartUp.cpu_core = g_NetPlaySettings.m_CPUcore;
-    StartUp.SelectedLanguage = g_NetPlaySettings.m_SelectedLanguage;
-    StartUp.bOverrideGCLanguage = g_NetPlaySettings.m_OverrideGCLanguage;
-    StartUp.m_DSPEnableJIT = g_NetPlaySettings.m_DSPEnableJIT;
-    StartUp.m_OCEnable = g_NetPlaySettings.m_OCEnable;
-    StartUp.m_OCFactor = g_NetPlaySettings.m_OCFactor;
-    StartUp.m_EXIDevice[0] = g_NetPlaySettings.m_EXIDevice[0];
-    StartUp.m_EXIDevice[1] = g_NetPlaySettings.m_EXIDevice[1];
+    const NetPlay::NetSettings& netplay_settings = NetPlay::g_NetPlaySettings;
+    Config::AddLayer(ConfigLoaders::GenerateNetPlayConfigLoader(netplay_settings));
+    StartUp.bCPUThread = netplay_settings.m_CPUthread;
+    StartUp.bEnableCheats = netplay_settings.m_EnableCheats;
+    StartUp.bDSPHLE = netplay_settings.m_DSPHLE;
+    StartUp.bEnableMemcardSdWriting = netplay_settings.m_WriteToMemcard;
+    StartUp.bCopyWiiSaveNetplay = netplay_settings.m_CopyWiiSave;
+    StartUp.cpu_core = netplay_settings.m_CPUcore;
+    StartUp.SelectedLanguage = netplay_settings.m_SelectedLanguage;
+    StartUp.bOverrideGCLanguage = netplay_settings.m_OverrideGCLanguage;
+    StartUp.m_DSPEnableJIT = netplay_settings.m_DSPEnableJIT;
+    StartUp.m_OCEnable = netplay_settings.m_OCEnable;
+    StartUp.m_OCFactor = netplay_settings.m_OCFactor;
+    StartUp.m_EXIDevice[0] = netplay_settings.m_EXIDevice[0];
+    StartUp.m_EXIDevice[1] = netplay_settings.m_EXIDevice[1];
     config_cache.bSetEXIDevice[0] = true;
     config_cache.bSetEXIDevice[1] = true;
   }
diff --git a/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.cpp b/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.cpp
index 0746ee13d0..1d959a286f 100644
--- a/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.cpp
+++ b/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.cpp
@@ -16,7 +16,7 @@ namespace ConfigLoaders
 class NetPlayConfigLayerLoader final : public Config::ConfigLayerLoader
 {
 public:
-  explicit NetPlayConfigLayerLoader(const NetSettings& settings)
+  explicit NetPlayConfigLayerLoader(const NetPlay::NetSettings& settings)
       : ConfigLayerLoader(Config::LayerType::Netplay), m_settings(settings)
   {
   }
@@ -47,11 +47,12 @@ public:
   }
 
 private:
-  const NetSettings m_settings;
+  const NetPlay::NetSettings m_settings;
 };
 
 // Loader generation
-std::unique_ptr<Config::ConfigLayerLoader> GenerateNetPlayConfigLoader(const NetSettings& settings)
+std::unique_ptr<Config::ConfigLayerLoader>
+GenerateNetPlayConfigLoader(const NetPlay::NetSettings& settings)
 {
   return std::make_unique<NetPlayConfigLayerLoader>(settings);
 }
diff --git a/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.h b/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.h
index 615d904a06..eaa0ba4ff1 100644
--- a/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.h
+++ b/Source/Core/Core/ConfigLoaders/NetPlayConfigLoader.h
@@ -6,14 +6,18 @@
 
 #include <memory>
 
-struct NetSettings;
-
 namespace Config
 {
 class ConfigLayerLoader;
 }
 
+namespace NetPlay
+{
+struct NetSettings;
+}
+
 namespace ConfigLoaders
 {
-std::unique_ptr<Config::ConfigLayerLoader> GenerateNetPlayConfigLoader(const NetSettings& settings);
+std::unique_ptr<Config::ConfigLayerLoader>
+GenerateNetPlayConfigLoader(const NetPlay::NetSettings& settings);
 }
diff --git a/Source/Core/Core/Core.cpp b/Source/Core/Core/Core.cpp
index f5bd36ab9b..18690ac4ac 100644
--- a/Source/Core/Core/Core.cpp
+++ b/Source/Core/Core/Core.cpp
@@ -122,7 +122,7 @@ void SetIsThrottlerTempDisabled(bool disable)
 void FrameUpdateOnCPUThread()
 {
   if (NetPlay::IsNetPlayRunning())
-    NetPlayClient::SendTimeBase();
+    NetPlay::NetPlayClient::SendTimeBase();
 }
 
 // Display messages and return values
diff --git a/Source/Core/Core/NetPlayClient.cpp b/Source/Core/Core/NetPlayClient.cpp
index be937c5299..33f975463c 100644
--- a/Source/Core/Core/NetPlayClient.cpp
+++ b/Source/Core/Core/NetPlayClient.cpp
@@ -41,6 +41,8 @@
 #include "VideoCommon/OnScreenDisplay.h"
 #include "VideoCommon/VideoConfig.h"
 
+namespace NetPlay
+{
 static std::mutex crit_netplay_client;
 static NetPlayClient* netplay_client = nullptr;
 NetSettings g_NetPlaySettings;
@@ -1306,41 +1308,59 @@ const PadMappingArray& NetPlayClient::GetWiimoteMapping() const
   return m_wiimote_map;
 }
 
+bool IsNetPlayRunning()
+{
+  return netplay_client != nullptr;
+}
+
+void NetPlay_Enable(NetPlayClient* const np)
+{
+  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  netplay_client = np;
+}
+
+void NetPlay_Disable()
+{
+  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  netplay_client = nullptr;
+}
+}  // namespace NetPlay
+
 // stuff hacked into dolphin
 
 // called from ---CPU--- thread
 // Actual Core function which is called on every frame
 bool SerialInterface::CSIDevice_GCController::NetPlay_GetInput(int numPAD, GCPadStatus* PadStatus)
 {
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  std::lock_guard<std::mutex> lk(NetPlay::crit_netplay_client);
 
-  if (netplay_client)
-    return netplay_client->GetNetPads(numPAD, PadStatus);
-  else
-    return false;
+  if (NetPlay::netplay_client)
+    return NetPlay::netplay_client->GetNetPads(numPAD, PadStatus);
+
+  return false;
 }
 
 bool WiimoteEmu::Wiimote::NetPlay_GetWiimoteData(int wiimote, u8* data, u8 size, u8 reporting_mode)
 {
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  std::lock_guard<std::mutex> lk(NetPlay::crit_netplay_client);
 
-  if (netplay_client)
-    return netplay_client->WiimoteUpdate(wiimote, data, size, reporting_mode);
-  else
-    return false;
+  if (NetPlay::netplay_client)
+    return NetPlay::netplay_client->WiimoteUpdate(wiimote, data, size, reporting_mode);
+
+  return false;
 }
 
 // Sync the info whether a button was pressed or not. Used for the reconnect on button press feature
 bool Wiimote::NetPlay_GetButtonPress(int wiimote, bool pressed)
 {
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  std::lock_guard<std::mutex> lk(NetPlay::crit_netplay_client);
 
   // Use the reporting mode 0 for the button pressed event, the real ones start at RT_REPORT_CORE
   u8 data[2] = {static_cast<u8>(pressed), 0};
 
-  if (netplay_client)
+  if (NetPlay::netplay_client)
   {
-    if (netplay_client->WiimoteUpdate(wiimote, data, 2, 0))
+    if (NetPlay::netplay_client->WiimoteUpdate(wiimote, data, 2, 0))
     {
       return data[0];
     }
@@ -1357,39 +1377,22 @@ bool Wiimote::NetPlay_GetButtonPress(int wiimote, bool pressed)
 // also called from ---GUI--- thread when starting input recording
 u64 ExpansionInterface::CEXIIPL::NetPlay_GetEmulatedTime()
 {
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  std::lock_guard<std::mutex> lk(NetPlay::crit_netplay_client);
 
-  if (netplay_client)
-    return g_netplay_initial_rtc;
-  else
-    return 0;
+  if (NetPlay::netplay_client)
+    return NetPlay::g_netplay_initial_rtc;
+
+  return 0;
 }
 
 // called from ---CPU--- thread
 // return the local pad num that should rumble given a ingame pad num
 int SerialInterface::CSIDevice_GCController::NetPlay_InGamePadToLocalPad(int numPAD)
 {
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
+  std::lock_guard<std::mutex> lk(NetPlay::crit_netplay_client);
 
-  if (netplay_client)
-    return netplay_client->InGamePadToLocalPad(numPAD);
-  else
-    return numPAD;
-}
+  if (NetPlay::netplay_client)
+    return NetPlay::netplay_client->InGamePadToLocalPad(numPAD);
 
-bool NetPlay::IsNetPlayRunning()
-{
-  return netplay_client != nullptr;
-}
-
-void NetPlay_Enable(NetPlayClient* const np)
-{
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
-  netplay_client = np;
-}
-
-void NetPlay_Disable()
-{
-  std::lock_guard<std::mutex> lk(crit_netplay_client);
-  netplay_client = nullptr;
+  return numPAD;
 }
diff --git a/Source/Core/Core/NetPlayClient.h b/Source/Core/Core/NetPlayClient.h
index 4fc401e950..c4ababf068 100644
--- a/Source/Core/Core/NetPlayClient.h
+++ b/Source/Core/Core/NetPlayClient.h
@@ -18,6 +18,8 @@
 #include "Core/NetPlayProto.h"
 #include "InputCommon/GCPadStatus.h"
 
+namespace NetPlay
+{
 class NetPlayUI
 {
 public:
@@ -186,3 +188,4 @@ private:
 
 void NetPlay_Enable(NetPlayClient* const np);
 void NetPlay_Disable();
+}  // namespace NetPlay
diff --git a/Source/Core/Core/NetPlayProto.h b/Source/Core/Core/NetPlayProto.h
index 97544ece12..dc582d3df8 100644
--- a/Source/Core/Core/NetPlayProto.h
+++ b/Source/Core/Core/NetPlayProto.h
@@ -14,6 +14,8 @@ namespace PowerPC
 enum class CPUCore;
 }
 
+namespace NetPlay
+{
 struct NetSettings
 {
   bool m_CPUthread;
@@ -109,7 +111,5 @@ using FrameNum = u32;
 using PadMapping = s8;
 using PadMappingArray = std::array<PadMapping, 4>;
 
-namespace NetPlay
-{
 bool IsNetPlayRunning();
-}
+}  // namespace NetPlay
diff --git a/Source/Core/Core/NetPlayServer.cpp b/Source/Core/Core/NetPlayServer.cpp
index 84eb1d6ee0..78ad81364c 100644
--- a/Source/Core/Core/NetPlayServer.cpp
+++ b/Source/Core/Core/NetPlayServer.cpp
@@ -40,6 +40,8 @@
 #include <arpa/inet.h>
 #endif
 
+namespace NetPlay
+{
 u64 g_netplay_initial_rtc = 1272737767;
 
 NetPlayServer::~NetPlayServer()
@@ -951,3 +953,4 @@ std::vector<std::pair<std::string, std::string>> NetPlayServer::GetInterfaceList
     result.emplace_back(std::make_pair("!local!", "127.0.0.1"));
   return result;
 }
+}  // namespace NetPlay
diff --git a/Source/Core/Core/NetPlayServer.h b/Source/Core/Core/NetPlayServer.h
index b0f52f8000..1dd01ed7ad 100644
--- a/Source/Core/Core/NetPlayServer.h
+++ b/Source/Core/Core/NetPlayServer.h
@@ -19,8 +19,8 @@
 #include "Common/TraversalClient.h"
 #include "Core/NetPlayProto.h"
 
-enum class PlayerGameStatus;
-
+namespace NetPlay
+{
 class NetPlayUI;
 enum class PlayerGameStatus;
 
@@ -124,3 +124,4 @@ private:
   TraversalClient* m_traversal_client = nullptr;
   NetPlayUI* m_dialog = nullptr;
 };
+}  // namespace NetPlay
diff --git a/Source/Core/DolphinQt/MainWindow.cpp b/Source/Core/DolphinQt/MainWindow.cpp
index bdc22b6473..2be44afaf1 100644
--- a/Source/Core/DolphinQt/MainWindow.cpp
+++ b/Source/Core/DolphinQt/MainWindow.cpp
@@ -1087,10 +1087,11 @@ bool MainWindow::NetPlayJoin()
   const std::string nickname = Config::Get(Config::NETPLAY_NICKNAME);
 
   // Create Client
-  Settings::Instance().ResetNetPlayClient(new NetPlayClient(
+  const bool is_hosting_netplay = Settings::Instance().GetNetPlayServer() != nullptr;
+  Settings::Instance().ResetNetPlayClient(new NetPlay::NetPlayClient(
       host_ip, host_port, m_netplay_dialog, nickname,
-      NetTraversalConfig{Settings::Instance().GetNetPlayServer() != nullptr ? false : is_traversal,
-                         traversal_host, traversal_port}));
+      NetPlay::NetTraversalConfig{is_hosting_netplay ? false : is_traversal, traversal_host,
+                                  traversal_port}));
 
   if (!Settings::Instance().GetNetPlayClient()->IsConnected())
   {
@@ -1134,8 +1135,9 @@ bool MainWindow::NetPlayHost(const QString& game_id)
     host_port = Config::Get(Config::NETPLAY_LISTEN_PORT);
 
   // Create Server
-  Settings::Instance().ResetNetPlayServer(new NetPlayServer(
-      host_port, use_upnp, NetTraversalConfig{is_traversal, traversal_host, traversal_port}));
+  Settings::Instance().ResetNetPlayServer(new NetPlay::NetPlayServer(
+      host_port, use_upnp,
+      NetPlay::NetTraversalConfig{is_traversal, traversal_host, traversal_port}));
 
   if (!Settings::Instance().GetNetPlayServer()->is_connected)
   {
diff --git a/Source/Core/DolphinQt/MainWindow.h b/Source/Core/DolphinQt/MainWindow.h
index 0ecc1414ee..e4f9757b31 100644
--- a/Source/Core/DolphinQt/MainWindow.h
+++ b/Source/Core/DolphinQt/MainWindow.h
@@ -34,9 +34,7 @@ class JITWidget;
 class LogConfigWidget;
 class LogWidget;
 class MemoryWidget;
-class NetPlayClient;
 class NetPlayDialog;
-class NetPlayServer;
 class NetPlaySetupDialog;
 class RegisterWidget;
 class SearchBar;
diff --git a/Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp b/Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp
index c61adc081b..ee03a52429 100644
--- a/Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp
+++ b/Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp
@@ -285,7 +285,7 @@ void NetPlayDialog::OnStart()
       return;
   }
 
-  NetSettings settings;
+  NetPlay::NetSettings settings;
 
   // Copy all relevant settings
   SConfig& instance = SConfig::GetInstance();
@@ -379,7 +379,8 @@ void NetPlayDialog::UpdateGUI()
       {tr("Player"), tr("Game Status"), tr("Ping"), tr("Mapping"), tr("Revision")});
   m_players_list->setRowCount(player_count);
 
-  const auto get_mapping_string = [](const Player* player, const PadMappingArray& array) {
+  const auto get_mapping_string = [](const NetPlay::Player* player,
+                                     const NetPlay::PadMappingArray& array) {
     std::string str;
     for (size_t i = 0; i < array.size(); i++)
     {
@@ -392,8 +393,10 @@ void NetPlayDialog::UpdateGUI()
     return '|' + str + '|';
   };
 
-  static const std::map<PlayerGameStatus, QString> player_status{
-      {PlayerGameStatus::Ok, tr("OK")}, {PlayerGameStatus::NotFound, tr("Not Found")}};
+  static const std::map<NetPlay::PlayerGameStatus, QString> player_status{
+      {NetPlay::PlayerGameStatus::Ok, tr("OK")},
+      {NetPlay::PlayerGameStatus::NotFound, tr("Not Found")},
+  };
 
   for (int i = 0; i < player_count; i++)
   {
diff --git a/Source/Core/DolphinQt/NetPlay/NetPlayDialog.h b/Source/Core/DolphinQt/NetPlay/NetPlayDialog.h
index 4c1013eeb5..0af53d91c7 100644
--- a/Source/Core/DolphinQt/NetPlay/NetPlayDialog.h
+++ b/Source/Core/DolphinQt/NetPlay/NetPlayDialog.h
@@ -11,7 +11,6 @@
 
 class MD5Dialog;
 class GameListModel;
-class NetPlayServer;
 class PadMappingDialog;
 class QCheckBox;
 class QComboBox;
@@ -26,7 +25,7 @@ class QTableWidget;
 class QTextEdit;
 class QToolButton;
 
-class NetPlayDialog : public QDialog, public NetPlayUI
+class NetPlayDialog : public QDialog, public NetPlay::NetPlayUI
 {
   Q_OBJECT
 public:
diff --git a/Source/Core/DolphinQt/NetPlay/PadMappingDialog.cpp b/Source/Core/DolphinQt/NetPlay/PadMappingDialog.cpp
index f526546d1a..a01c2c53c8 100644
--- a/Source/Core/DolphinQt/NetPlay/PadMappingDialog.cpp
+++ b/Source/Core/DolphinQt/NetPlay/PadMappingDialog.cpp
@@ -94,12 +94,13 @@ int PadMappingDialog::exec()
 
   return QDialog::exec();
 }
-PadMappingArray PadMappingDialog::GetGCPadArray()
+
+NetPlay::PadMappingArray PadMappingDialog::GetGCPadArray()
 {
   return m_pad_mapping;
 }
 
-PadMappingArray PadMappingDialog::GetWiimoteArray()
+NetPlay::PadMappingArray PadMappingDialog::GetWiimoteArray()
 {
   return m_wii_mapping;
 }
diff --git a/Source/Core/DolphinQt/NetPlay/PadMappingDialog.h b/Source/Core/DolphinQt/NetPlay/PadMappingDialog.h
index 3677a1f5e5..6a359d6632 100644
--- a/Source/Core/DolphinQt/NetPlay/PadMappingDialog.h
+++ b/Source/Core/DolphinQt/NetPlay/PadMappingDialog.h
@@ -8,12 +8,15 @@
 
 #include "Core/NetPlayProto.h"
 
-class NetPlayClient;
-class Player;
 class QGridLayout;
 class QComboBox;
 class QDialogButtonBox;
 
+namespace NetPlay
+{
+class Player;
+}
+
 class PadMappingDialog : public QDialog
 {
   Q_OBJECT
@@ -22,8 +25,8 @@ public:
 
   int exec() override;
 
-  PadMappingArray GetGCPadArray();
-  PadMappingArray GetWiimoteArray();
+  NetPlay::PadMappingArray GetGCPadArray();
+  NetPlay::PadMappingArray GetWiimoteArray();
 
 private:
   void CreateWidgets();
@@ -31,12 +34,12 @@ private:
 
   void OnMappingChanged();
 
-  PadMappingArray m_pad_mapping;
-  PadMappingArray m_wii_mapping;
+  NetPlay::PadMappingArray m_pad_mapping;
+  NetPlay::PadMappingArray m_wii_mapping;
 
   QGridLayout* m_main_layout;
   std::array<QComboBox*, 4> m_gc_boxes;
   std::array<QComboBox*, 4> m_wii_boxes;
-  std::vector<const Player*> m_players;
+  std::vector<const NetPlay::Player*> m_players;
   QDialogButtonBox* m_button_box;
 };
diff --git a/Source/Core/DolphinQt/Settings.cpp b/Source/Core/DolphinQt/Settings.cpp
index 3134133fa5..58b22431b0 100644
--- a/Source/Core/DolphinQt/Settings.cpp
+++ b/Source/Core/DolphinQt/Settings.cpp
@@ -268,22 +268,22 @@ GameListModel* Settings::GetGameListModel() const
   return model;
 }
 
-NetPlayClient* Settings::GetNetPlayClient()
+NetPlay::NetPlayClient* Settings::GetNetPlayClient()
 {
   return m_client.get();
 }
 
-void Settings::ResetNetPlayClient(NetPlayClient* client)
+void Settings::ResetNetPlayClient(NetPlay::NetPlayClient* client)
 {
   m_client.reset(client);
 }
 
-NetPlayServer* Settings::GetNetPlayServer()
+NetPlay::NetPlayServer* Settings::GetNetPlayServer()
 {
   return m_server.get();
 }
 
-void Settings::ResetNetPlayServer(NetPlayServer* server)
+void Settings::ResetNetPlayServer(NetPlay::NetPlayServer* server)
 {
   m_server.reset(server);
 }
diff --git a/Source/Core/DolphinQt/Settings.h b/Source/Core/DolphinQt/Settings.h
index ba6facb87c..5af90a3da6 100644
--- a/Source/Core/DolphinQt/Settings.h
+++ b/Source/Core/DolphinQt/Settings.h
@@ -93,10 +93,10 @@ public:
   void DecreaseVolume(int volume);
 
   // NetPlay
-  NetPlayClient* GetNetPlayClient();
-  void ResetNetPlayClient(NetPlayClient* client = nullptr);
-  NetPlayServer* GetNetPlayServer();
-  void ResetNetPlayServer(NetPlayServer* server = nullptr);
+  NetPlay::NetPlayClient* GetNetPlayClient();
+  void ResetNetPlayClient(NetPlay::NetPlayClient* client = nullptr);
+  NetPlay::NetPlayServer* GetNetPlayServer();
+  void ResetNetPlayServer(NetPlay::NetPlayServer* server = nullptr);
 
   // Cheats
   bool GetCheatsEnabled() const;
@@ -163,8 +163,8 @@ signals:
 private:
   bool m_batch = false;
   bool m_controller_state_needed = false;
-  std::unique_ptr<NetPlayClient> m_client;
-  std::unique_ptr<NetPlayServer> m_server;
+  std::unique_ptr<NetPlay::NetPlayClient> m_client;
+  std::unique_ptr<NetPlay::NetPlayServer> m_server;
   Settings();
 };