diff --git a/src/game/client/input.cpp b/src/game/client/input.cpp
index 6a2f4ced..74255b2b 100644
--- a/src/game/client/input.cpp
+++ b/src/game/client/input.cpp
@@ -7,7 +7,7 @@
 #include "common/global.h"
 #include "game/shared/weapon_types.h"
 
-void CInput::SetCustomWeaponActivity(CInput* pInput, int weaponActivity)
+void CInput::VSetCustomWeaponActivity(CInput* pInput, int weaponActivity)
 {
 	// Server only allows other custom weapon activities if cheats are enabled,
 	// don't bother simulating it on the client without the cheats cvar, as
@@ -20,5 +20,5 @@ void CInput::SetCustomWeaponActivity(CInput* pInput, int weaponActivity)
 
 void VInput::Detour(const bool bAttach) const
 {
-	DetourSetup(&v_CInput__SetCustomWeaponActivity, CInput::SetCustomWeaponActivity, bAttach);
+	DetourSetup(&v_CInput__SetCustomWeaponActivity, CInput::VSetCustomWeaponActivity, bAttach);
 }
diff --git a/src/game/client/input.h b/src/game/client/input.h
index c3206bf8..f727d1dc 100644
--- a/src/game/client/input.h
+++ b/src/game/client/input.h
@@ -1,11 +1,48 @@
 #ifndef CLIENT_INPUT_H
 #define CLIENT_INPUT_H
+#include "game/shared/weapon_types.h"
 #include "game/client/iinput.h"
 
 class CInput : public IInput
 {
 public:
-	static void SetCustomWeaponActivity(CInput* pInput, int weaponActivity);
+	virtual void sub_140701C40() = 0;
+	virtual void sub_140701D60() = 0;
+	virtual void sub_140701D90() = 0;
+
+	virtual int GetMaxAbilityBindingCount( void ) = 0;
+	virtual int GetMaxAbilityBindingLength( void ) = 0;
+
+	virtual void sub_140701DC0() = 0;
+
+	virtual void SetJoystickDebounce( int nSlot = -1 ) = 0;
+	virtual void ClearJoystickDebounce( int nSlot = -1 ) = 0;
+
+	virtual float		GetLastSwapSelectTime() = 0;
+	virtual void		SetLastSwapSelectTime( float lastSelectTime ) = 0;
+	virtual float		Unknown_GetFloat20() = 0;
+	virtual void		Unknown_SetFloat20( float a2 ) = 0;
+	virtual float		Unknown_GetFloat24() = 0;
+	virtual void		Unknown_SetFloat24( float a2 ) = 0;
+
+	virtual float		GetLastButtonPressTime( void ) = 0;
+	virtual void		SetLastButtonPressTime( float lastPressTime ) = 0;
+	virtual void		LinkButtonPair( int button1, int button2, int output ) = 0;
+
+	virtual void sub_140701720() = 0;
+
+	virtual void SetCustomWeaponActivity( WeaponActivity_t weaponActivity ) = 0;
+	virtual void ActivateOffhandWeaponByIndex( char index /*TODO[ AMOS ]: needs enum, enumVal 6 = INVALID; see Script_ActivateOffhandWeaponByIndex*/ ) = 0;
+
+	virtual void ChangeControllerMode( bool newMode ) = 0;
+
+	virtual void SetZoomScale( float zoomScale ) = 0;      // Used for SetBigMapZoomScale script func
+	virtual float GetZoomScale() = 0;                      // Used for GetBigMapZoomScale script func
+	virtual void SetZoomAnchor( Vector2D& inAnchor ) = 0;  // Used for SetBigMapZoomAnchor script func
+	virtual void GetZoomAnchor( Vector2D& outAnchor ) = 0; // Used for SetBigMapZoomAnchor script func
+
+public: // Hook statics
+	static void VSetCustomWeaponActivity( CInput* pInput, int weaponActivity );
 private:
 };
 
diff --git a/src/public/game/client/iinput.h b/src/public/game/client/iinput.h
index f52055e7..2413f8b9 100644
--- a/src/public/game/client/iinput.h
+++ b/src/public/game/client/iinput.h
@@ -1,10 +1,110 @@
 #ifndef IINPUT_H
 #define IINPUT_H
 
+class bf_write;
+class bf_read;
+class CUserCmd;
+struct kbutton_t;
+
+struct CameraThirdData_t
+{
+	float	m_flPitch;
+	float	m_flYaw;
+	float	m_flDist;
+	float	m_flLag;
+	Vector3D	m_vecHullMin;
+	Vector3D	m_vecHullMax;
+};
+
 abstract_class IInput
 {
 public:
 	virtual ~IInput() {};
+
+	// Initialization/shutdown of the subsystem
+	virtual	void		Init_All( void ) = 0;
+	virtual void		Shutdown_All( void ) = 0;
+	// Latching button states
+	virtual int			GetButtonBits( bool resetState ) = 0;
+	// Create movement command
+	virtual void		CreateMove ( int sequenceNumber, float inputSampleFrametime, bool active ) = 0;
+	virtual void		ExtraMouseSample( float frametime ) = 0;
+	virtual bool		WriteUsercmdDeltaToBuffer( int slot, bf_write *buf, int from, int to ) = 0;
+	virtual void		EncodeUserCmdToBuffer( int slot, bf_write& buf, int sequenceNumber ) = 0;
+	virtual void		DecodeUserCmdFromBuffer( int slot, bf_read& buf, int sequenceNumber ) = 0;
+
+	virtual CUserCmd	*GetUserCmd( int slot, int sequenceNumber ) = 0; // TODO[ AMOS ]: CUserCmdExteded*
+
+	virtual void MakeWeaponSelection( int secondary, int primary ) = 0;
+
+	virtual void sub_140702970() = 0;
+	virtual void sub_140702980() = 0;
+
+	virtual bool MouseInitialized() = 0;
+
+	// Retrieve key state
+	virtual float		KeyState( kbutton_t* key ) = 0;
+
+	virtual void sub_140701EC0() = 0;
+	virtual void sub_140701F50() = 0;
+	virtual void sub_140702000() = 0;
+
+	// Look for key
+	virtual kbutton_t* FindKey(const char* name) = 0;
+
+	// Extra initialization for some joysticks
+	virtual bool		ControllerModeActive() = 0;
+	virtual bool		JoystickActive() = 0;
+
+	virtual void		Joystick_SetSampleTime( float frametime ) = 0;
+	virtual void		IN_SetSampleTime( float frametime ) = 0;
+
+	// Accumulate mouse delta
+	virtual void		AccumulateMouse( int nSlot ) = 0; // Unimplemented in R5
+
+	// Activate/deactivate mouse
+	virtual void		ActivateMouse( void ) = 0;
+	virtual void		DeactivateMouse( void ) = 0;
+
+	// Clear mouse state data
+	virtual void		ClearStates( void ) = 0;
+	// Retrieve lookspring setting
+	virtual float		GetLookSpring( void ) = 0;
+
+	// Clear weapon activities and additional UserCmd related data
+	virtual void		ClearSupplementalWeaponData( void ) = 0;
+
+	// Retrieve mouse position
+	virtual void		GetFullscreenMousePos( int *mx, int *my, int *unclampedx = 0, int *unclampedy = 0 ) = 0;
+	virtual void		SetFullscreenMousePos( int mx, int my ) = 0;
+	virtual void		ResetMouse() = 0;
+	virtual	float		GetLastForwardMove( void ) = 0;
+
+	// Third Person camera
+	virtual void		CAM_Think( void ) = 0;
+	virtual int			CAM_IsThirdPerson( int nSlot = -1 ) = 0;
+	virtual void		CAM_GetCameraOffset( Vector3D& ofs ) = 0;
+	virtual void		CAM_SetCameraOffset( Vector3D& ofs ) = 0;
+	virtual void		CAM_ToThirdPerson( void ) = 0;
+	virtual void		CAM_ToFirstPerson( void ) = 0;
+	virtual void		CAM_StartMouseMove( void ) = 0;
+	virtual void		CAM_EndMouseMove( void ) = 0;
+	virtual void		CAM_StartDistance( void ) = 0;
+	virtual void		CAM_EndDistance( void ) = 0;
+	virtual int			CAM_InterceptingMouse( void ) = 0;
+	virtual	void		CAM_Command( int command ) = 0;
+
+	virtual void		Unknown_SetFloatB0( float a2 ) = 0;
+	virtual float		Unknown_GetFloatB0() = 0;
+
+	virtual void		nullsub_0() = 0;
+	virtual int			sub_1407060E0() = 0;
+
+	// Causes an input to have to be re-pressed to become active
+	virtual void		ClearInputButton( int bits ) = 0;
+
+	virtual	void		CAM_SetCameraThirdData( CameraThirdData_t *pCameraData, const QAngle &vecCameraOffset ) = 0;
+	virtual void		CAM_CameraThirdThink( void ) = 0;
 };
 
 #endif // IINPUT_H