diff --git a/README.md b/README.md
index ec18a13..f0de291 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,18 @@
-# Client_RPG
-
-Top-down client for GameMode_RPG
\ No newline at end of file
+# Client_RPG
+
+Required client add-on for **GameMode_RPG**: top-down orbit camera, click-to-move/combat, HUD and `/rpg` window hotkeys.
+
+Install into `Add-Ons/Client_RPG` (same folder name as on the server).
+
+## Controls
+
+| Input | Action |
+|---|---|
+| Left click | Walk / attack / interact (server resolves the ray) |
+| Right click | Talk / context |
+| A/D, arrows | Rotate camera |
+| PgUp/PgDn, +/- | Zoom |
+| B / K / E | Bag / skills / equip lists |
+| R | Toggle auto-retaliate |
+
+Protocol version **2** — must match `GameMode_RPG` ui/protocol.cs.
diff --git a/client.cs b/client.cs
new file mode 100644
index 0000000..10ad315
--- /dev/null
+++ b/client.cs
@@ -0,0 +1,367 @@
+// Client_RPG — top-down camera, click-to-move, and RPG windows for GameMode_RPG.
+exec("./ui.cs");
+// The server probes with RPG_Probe; reply with serverCmdRPG_Hello(2) to play.
+
+$RPGClient::Version = 2;
+$RPGClient::Active = 0;
+$RPGClient::Yaw = 0;
+$RPGClient::Dist = 14;
+
+function RPGClient_NormPos(%ctrl, %pos)
+{
+	if (!isObject(%ctrl))
+	{
+		return "0.5 0.5";
+	}
+	%ext = %ctrl.getExtent();
+	%w = getWord(%ext, 0);
+	%h = getWord(%ext, 1);
+	if (%w < 1)
+	{
+		%w = 1;
+	}
+	if (%h < 1)
+	{
+		%h = 1;
+	}
+	%x = getWord(%pos, 0) / %w;
+	%y = 1 - getWord(%pos, 1) / %h;
+	if (%x < 0)
+	{
+		%x = 0;
+	}
+	if (%x > 1)
+	{
+		%x = 1;
+	}
+	if (%y < 0)
+	{
+		%y = 0;
+	}
+	if (%y > 1)
+	{
+		%y = 1;
+	}
+	return %x SPC %y;
+}
+
+function RPGClient_Aspect()
+{
+	if (!isObject(Canvas))
+	{
+		return 1.333;
+	}
+	%ext = Canvas.getExtent();
+	%w = getWord(%ext, 0);
+	%h = getWord(%ext, 1);
+	return %h > 0 ? %w / %h : 1.333;
+}
+
+function RPGClient_SendClick(%button, %pos)
+{
+	if (!isObject(serverConnection))
+	{
+		return;
+	}
+	%norm = RPGClient_NormPos(RPGClient_Mouse, %pos);
+	commandToServer('RPG_Click', %button, getWord(%norm, 0), getWord(%norm, 1), RPGClient_Aspect());
+}
+
+function RPGClient_Mouse::onMouseDown(%this, %modifier, %mouseClick, %mousePos, %button)
+{
+	if (!$RPGClient::Active)
+	{
+		return;
+	}
+	RPGClient_SendClick(%button, %mousePos);
+}
+
+function RPGClient_Mouse::onRightMouseDown(%this, %modifier, %mouseClick, %mousePos, %button)
+{
+	if (!$RPGClient::Active)
+	{
+		return;
+	}
+	RPGClient_SendClick(1, %mousePos);
+}
+
+function RPGClient_EnableOverlay()
+{
+	if (!isObject(PlayGui) || isObject(RPGClient_Mouse))
+	{
+		return;
+	}
+	RPGClient_Mouse = new GuiMouseEventCtrl(RPGClient_Mouse)
+	{
+		horizSizing = "width";
+		vertSizing = "height";
+		position = "0 0";
+		extent = "640 480";
+		profile = "GuiDefaultProfile";
+		visible = "1";
+		enabled = "1";
+	};
+	PlayGui.add(RPGClient_Mouse);
+	RPGClient_Mouse.pushToBack();
+	if (isObject(RPGClient_KeyMap))
+	{
+		RPGClient_KeyMap.delete();
+	}
+	RPGClient_KeyMap = new ActionMap("RPGClient_KeyMap");
+	RPGClient_KeyMap.bind(keyboard0, a, RPGClient_YawLeft);
+	RPGClient_KeyMap.bind(keyboard0, d, RPGClient_YawRight);
+	RPGClient_KeyMap.bind(keyboard0, left, RPGClient_YawLeft);
+	RPGClient_KeyMap.bind(keyboard0, right, RPGClient_YawRight);
+	RPGClient_KeyMap.bind(keyboard0, pgup, RPGClient_ZoomIn);
+	RPGClient_KeyMap.bind(keyboard0, pgdn, RPGClient_ZoomOut);
+	RPGClient_KeyMap.bind(keyboard0, equals, RPGClient_ZoomIn);
+	RPGClient_KeyMap.bind(keyboard0, minus, RPGClient_ZoomOut);
+	Canvas.pushDialog(RPGClient_Mouse, 0);
+	RPGClient_KeyMap.push();
+	if (isObject(PlayGui))
+	{
+		PlayGui.killToolHud();
+	}
+}
+
+function RPGClient_DisableOverlay()
+{
+	if (isObject(RPGClient_KeyMap))
+	{
+		RPGClient_KeyMap.pop();
+	}
+	if (isObject(RPGClient_Mouse))
+	{
+		Canvas.popDialog(RPGClient_Mouse);
+		RPGClient_Mouse.delete();
+	}
+	$RPGClient::Active = 0;
+}
+
+function RPGClient_ApplyCamera()
+{
+	if (!isObject(localClientConnection) || !isObject(localClientConnection.player))
+	{
+		return;
+	}
+	%body = localClientConnection.player;
+	%cam = localClientConnection.getControlObject();
+	if (!isObject(%cam) || %cam.getClassName() !$= "Camera")
+	{
+		%cam = localClientConnection.camera;
+	}
+	if (!isObject(%cam))
+	{
+		return;
+	}
+	localClientConnection.setControlObject(%cam);
+	%rot = "0 0" SPC mSin($RPGClient::Yaw / 2) SPC mCos($RPGClient::Yaw / 2);
+	%cam.setOrbitMode(%body, %body.getTransform(), 4, 32, $RPGClient::Dist);
+	%cam.thirdPersonOnly = 1;
+	commandToServer('RPG_CamSync', $RPGClient::Yaw, $RPGClient::Dist);
+}
+
+function RPGClient_YawLeft(%val)
+{
+	if (!$RPGClient::Active || %val == 0)
+	{
+		return;
+	}
+	$RPGClient::Yaw = $RPGClient::Yaw - 0.06;
+	RPGClient_ApplyCamera();
+}
+
+function RPGClient_YawRight(%val)
+{
+	if (!$RPGClient::Active || %val == 0)
+	{
+		return;
+	}
+	$RPGClient::Yaw = $RPGClient::Yaw + 0.06;
+	RPGClient_ApplyCamera();
+}
+
+function RPGClient_ZoomIn(%val)
+{
+	if (!$RPGClient::Active || %val == 0)
+	{
+		return;
+	}
+	$RPGClient::Dist = getMax(6, $RPGClient::Dist - 0.6);
+	RPGClient_ApplyCamera();
+}
+
+function RPGClient_ZoomOut(%val)
+{
+	if (!$RPGClient::Active || %val == 0)
+	{
+		return;
+	}
+	$RPGClient::Dist = getMin(32, $RPGClient::Dist + 0.6);
+	RPGClient_ApplyCamera();
+}
+
+function clientCmdRPG_Probe()
+{
+	if (isObject(serverConnection))
+	{
+		commandToServer('RPG_Hello', $RPGClient::Version);
+	}
+}
+
+function clientCmdRPG_Welcome(%serverProto, %accepted)
+{
+	if (%accepted && %serverProto == $RPGClient::Version)
+	{
+		$RPGClient::Server = 1;
+	}
+}
+
+function clientCmdRPG_TopDown(%on, %yaw, %dist)
+{
+	if (%on)
+	{
+		$RPGClient::Active = 1;
+		$RPGClient::Yaw = %yaw;
+		$RPGClient::Dist = %dist > 0 ? %dist : 14;
+		RPGClient_EnableOverlay();
+		RPGClient_BindKeys();
+		schedule(50, 0, RPGClient_ApplyCamera);
+		schedule(200, 0, RPGClient_ApplyCamera);
+	}
+	else
+	{
+		RPGClient_DisableOverlay();
+		RPGClient_UnbindKeys();
+	}
+}
+
+function clientCmdRPG_Hud(%hp, %maxHp, %silver, %load, %cap, %skillId, %skillValue, %blocking, %tHp, %tMax)
+{
+	RPGClient_Hud_Update(%hp, %maxHp, %silver, %load, %cap, %skillId, %skillValue, %tHp, %tMax);
+}
+
+function clientCmdRPG_HudOff()
+{
+	RPGClient_Hud_Hide();
+}
+
+function clientCmdRPG_Notify(%text, %sec)
+{
+	if (%text !$= "")
+	{
+		RPGClient_Notify_Show(%text, %sec);
+	}
+}
+
+function clientCmdRPG_Dialog(%title, %body, %sec)
+{
+	RPGClient_Dialog_Show(%title, %body, %sec);
+}
+
+function clientCmdRPG_ListBegin(%title, %page, %pages)
+{
+	RPGClient_List_Begin(%title, %page, %pages);
+}
+
+function clientCmdRPG_ListRow(%row)
+{
+	RPGClient_List_Row(%row);
+}
+
+function clientCmdRPG_ListEnd()
+{
+	RPGClient_List_End();
+}
+
+// --- HUD / list / dialog (Phase 4): thin windows on PlayGui ---
+function RPGClient_Hud_Ensure()
+{
+	if (isObject(RPGClient_Hud))
+	{
+		return;
+	}
+	RPGClient_Hud = new GuiTextCtrl()
+	{
+		horizSizing = "width";
+		vertSizing = "top";
+		position = "8 8";
+		extent = "600 24";
+		profile = "ChatHudMessageProfile";
+		text = "";
+	};
+	PlayGui.add(RPGClient_Hud);
+}
+
+function RPGClient_Hud_Update(%hp, %maxHp, %silver, %load, %cap, %skillId, %skillValue, %tHp, %tMax)
+{
+	if (!$RPGClient::Active)
+	{
+		return;
+	}
+	RPGClient_Hud_Ensure();
+	%t = "";
+	if (%tMax > 0)
+	{
+		%t = " | Target " @ %tHp @ "/" @ %tMax;
+	}
+	RPGClient_Hud.setText("HP " @ %hp @ "/" @ %maxHp @ %t @ " | " @ %silver @ " silver | load " @ %load @ "/" @ %cap @ " | " @ %skillId @ " " @ %skillValue);
+}
+
+function RPGClient_Hud_Hide()
+{
+	if (isObject(RPGClient_Hud))
+	{
+		RPGClient_Hud.setText("");
+	}
+}
+
+function RPGClient_Notify_Show(%text, %sec)
+{
+	RPGClient_Hud_Ensure();
+	RPGClient_Hud.setText(%text);
+	if (%sec > 0)
+	{
+		schedule(%sec * 1000, RPGClient_Hud, setText, "");
+	}
+}
+
+function RPGClient_Dialog_Show(%title, %body, %sec)
+{
+	messageBoxOK(%title, %body, "");
+}
+
+function RPGClient_List_Begin(%title, %page, %pages)
+{
+	if (isObject(RPGClient_List))
+	{
+		RPGClient_List.delete();
+	}
+	RPGClient_List = "";
+	RPGClient_ListTitle = %title @ " (" @ (%page + 1) @ "/" @ %pages @ ")";
+}
+
+function RPGClient_List_Row(%row)
+{
+	RPGClient_List = RPGClient_List @ %row @ "\n";
+}
+
+function RPGClient_List_End()
+{
+	if (RPGClient_List !$= "")
+	{
+		messageBoxOK(RPGClient_ListTitle, RPGClient_List, "");
+	}
+}
+
+package RPGClient_Disconnect
+{
+	function disconnect()
+	{
+		RPGClient_DisableOverlay();
+		Parent::disconnect();
+	}
+};
+activatePackage(RPGClient_Disconnect);
+
+echo("Client_RPG loaded (protocol " @ $RPGClient::Version @ ")");
diff --git a/description.txt b/description.txt
new file mode 100644
index 0000000..295e9a2
--- /dev/null
+++ b/description.txt
@@ -0,0 +1,2 @@
+Client_RPG
+Required client add-on for the GameMode_RPG realm: top-down camera, click-to-move and combat, and the RPG windows. Without it you can only spectate on an RPG server.
diff --git a/ui.cs b/ui.cs
new file mode 100644
index 0000000..574da5a
--- /dev/null
+++ b/ui.cs
@@ -0,0 +1,72 @@
+// Client windows: hotkeys open /rpg lists; the server still validates every command.
+
+$RPGClient::MenuOpen = 0;
+
+function RPGClient_RunCmd(%cmd)
+{
+	if (!isObject(serverConnection))
+	{
+		return;
+	}
+	commandToServer('message', "/rpg " @ %cmd);
+}
+
+function RPGClient_ToggleMenu(%name, %cmd)
+{
+	if ($RPGClient::MenuOpen $= %name)
+	{
+		$RPGClient::MenuOpen = "";
+		return;
+	}
+	$RPGClient::MenuOpen = %name;
+	RPGClient_RunCmd(%cmd);
+}
+
+function RPGClient_Menu_Bag()
+{
+	RPGClient_ToggleMenu("bag", "bag");
+}
+
+function RPGClient_Menu_Skills()
+{
+	RPGClient_ToggleMenu("skills", "skills");
+}
+
+function RPGClient_Menu_Equip()
+{
+	RPGClient_ToggleMenu("equip", "equip");
+}
+
+function RPGClient_Menu_Help()
+{
+	RPGClient_RunCmd("help");
+}
+
+function RPGClient_Menu_Retaliate()
+{
+	RPGClient_RunCmd("retaliate");
+}
+
+function RPGClient_BindKeys()
+{
+	if (isObject(RPGClient_MenuMap))
+	{
+		RPGClient_MenuMap.delete();
+	}
+	RPGClient_MenuMap = new ActionMap("RPGClient_MenuMap");
+	RPGClient_MenuMap.bind(keyboard0, b, RPGClient_Menu_Bag);
+	RPGClient_MenuMap.bind(keyboard0, k, RPGClient_Menu_Skills);
+	RPGClient_MenuMap.bind(keyboard0, e, RPGClient_Menu_Equip);
+	RPGClient_MenuMap.bind(keyboard0, f1, RPGClient_Menu_Help);
+	RPGClient_MenuMap.bind(keyboard0, r, RPGClient_Menu_Retaliate);
+	RPGClient_MenuMap.push();
+}
+
+function RPGClient_UnbindKeys()
+{
+	if (isObject(RPGClient_MenuMap))
+	{
+		RPGClient_MenuMap.pop();
+		RPGClient_MenuMap.delete();
+	}
+}