diff --git a/public/engine/hoststate.h b/public/engine/hoststate.h
new file mode 100644
index 00000000..38283ea7
--- /dev/null
+++ b/public/engine/hoststate.h
@@ -0,0 +1,84 @@
+#include "tier1/utlstring.h"
+#include "tier1/KeyValues.h"
+#include "appframework/IAppSystem.h"
+#include "tier2/tier2.h"
+
+struct ResourceManifestDesc_t;
+
+enum HostStateRequestType_t
+{
+	HSR_IDLE = 1,
+	HSR_GAME,
+	HSR_SOURCETV_RELAY,
+	HSR_QUIT
+};
+
+enum HostStateRequestMode_t
+{
+	HM_LEVEL_LOAD_SERVER = 1,
+	HM_CONNECT,
+	HM_CHANGE_LEVEL,
+	HM_LEVEL_LOAD_LISTEN,
+	HM_LOAD_SAVE,
+	HM_PLAY_DEMO,
+	HM_SOURCETV_RELAY,
+	HM_ADDON_DOWNLOAD
+};
+
+struct CHostStateRequest
+{
+	HostStateRequestType_t m_iType;
+	CUtlString m_LoopModeType;
+	CUtlString m_Desc;
+	bool m_bActive;
+	unsigned int m_ID;
+	HostStateRequestMode_t m_iMode;
+	CUtlString m_LevelName;
+	bool m_bChangelevel;
+	CUtlString m_SaveGame;
+	CUtlString m_Address;
+	CUtlString m_DemoFile;
+	bool m_bLoadMap;
+	CUtlString m_Addons;
+	KeyValues *m_pKV;
+};
+
+class ISwitchLoopModeStatusNotify
+{
+	virtual void OnSwitchLoopModeFinished(const char *, uint32, bool) = 0;
+};
+
+class IHostStateMgr : public IAppSystem
+{
+	virtual void RequestHS_Quit(void) = 0;
+	virtual void RequestHS_Idle(KeyValues *) = 0;
+	virtual void RequestHS_Connect(const char *, KeyValues *) = 0;
+	virtual void RequestHS_ChangelevelReconnect(const char *, KeyValues *) = 0;
+	virtual void RequestHS_LoadSpawnGroup(const char *, const char *, bool, KeyValues *) = 0;
+	virtual void RequestHS_LoadSaveGame(const char *, const char *, KeyValues *) = 0;
+	virtual void RequestHS_PlayDemo(const char *, const char *, bool, KeyValues *) = 0;
+	virtual void RequestHS_PlayBroadcast(const char *, KeyValues *) = 0;
+	virtual void RequestHS_DownloadAddons(KeyValues *) = 0;
+	virtual void RequestHS_SourceTVRelay(const char *, KeyValues *) = 0;
+	virtual void RequestHS_ReloadLastSaveGame(void) = 0;
+	virtual void RequestHS_RestartSpawnGroups(void) = 0;
+};
+
+class CHostStateMgr : public CTier2AppSystem<IHostStateMgr>, public ISwitchLoopModeStatusNotify
+{
+public:
+	CHostStateRequest *m_PendingRequest;              // 0x30
+	CHostStateRequest *m_CurrentRequest;              // 0x38
+	CUtlString m_LoopModeType;                        // 0x40 console/game
+	KeyValues *m_pGameConfigurationKV;                // 0x48
+	CUtlString m_LoopMode;                            // 0x50
+	KeyValues *m_pConnectKV;                          // 0x58
+	CUtlString m_LoopModeName;                        // 0x60
+	CUtlString m_Address;                             // 0x68
+	CUtlString m_SaveGame;                            // 0x70
+	CUtlString m_LevelName;                           // 0x78
+	CUtlString m_Addons;                              // 0x80
+	KeyValues *m_pKV;                                 // 0x88
+	int m_ID;                                         // 0x90
+	CUtlVector<CHostStateRequest *> m_QueuedRequests; // 0x98
+};
diff --git a/public/tier2/tier2.h b/public/tier2/tier2.h
index 8d6ccdc1..66429609 100644
--- a/public/tier2/tier2.h
+++ b/public/tier2/tier2.h
@@ -13,7 +13,7 @@
 #endif
 
 #include "tier1/tier1.h"
-
+struct ResourceManifestDesc_t;
 
 //-----------------------------------------------------------------------------
 // Call this to connect to/disconnect from all tier 2 libraries.
@@ -80,6 +80,9 @@ public:
 		DisconnectTier2Libraries();
 		BaseClass::Disconnect();
 	}
+private:
+	CUtlVector<ResourceManifestDesc_t *> m_manualManifests;
+	int m_nAppSysTier2LibraryConnects;
 };