Index: binaries/data/mods/public/gui/gamesetup/gamesetup.js
===================================================================
--- binaries/data/mods/public/gui/gamesetup/gamesetup.js
+++ binaries/data/mods/public/gui/gamesetup/gamesetup.js
@@ -137,6 +137,7 @@
  * Highlight ready players.
  */
 const g_ReadyColor = "green";
+const g_StayReadyColor = "blue";
 
 /**
  * Placeholder item for the map-dropdownlist.
@@ -172,6 +173,9 @@
 
 /**
  * Whether the current player is ready to start the game.
+ * 0 - not ready
+ * 1 - ready
+ * 2 - stay ready
  */
 var g_IsReady;
 
@@ -706,7 +710,7 @@
 {
 	--g_ReadyChanged;
 
-	if (g_ReadyChanged < 1 && g_PlayerAssignments[message.guid].player != -1)
+	if (g_ReadyChanged < 1 && g_PlayerAssignments[message.guid].player != -1 && message.status < 2)
 		addChatMessage({
 			"type": message.status == 1 ? "ready" : "not-ready",
 			"guid": message.guid
@@ -1857,7 +1861,7 @@
 
 function toggleReady()
 {
-	setReady(!g_IsReady);
+	setReady((g_IsReady + 1) % 3);
 }
 
 function setReady(ready, sendMessage = true)
@@ -1871,14 +1875,15 @@
 		return;
 
 	let button = Engine.GetGUIObjectByName("startGame");
-
-	button.caption = g_IsReady ?
-		translate("I'm not ready!") :
-		translate("I'm ready");
-
-	button.tooltip = g_IsReady ?
-		translate("State that you are not ready to play.") :
-		translate("State that you are ready to play!");
+	button.caption = [
+		translate("I'm ready"), translate("Stay ready"),
+		translate("I'm not ready!")][+g_IsReady];
+
+	button.tooltip = [
+		translate("State that you are ready to play!"),
+		translate("Stay ready even when the game settings change."),
+		translate("State that you are not ready to play.")
+		][+g_IsReady];
 }
 
 function updateReadyUI()
@@ -1897,7 +1902,9 @@
 		let pDefs = g_DefaultPlayerData ? g_DefaultPlayerData[g_PlayerAssignments[guid].player - 1] : {};
 		isAI[g_PlayerAssignments[guid].player] = false;
 		if (g_PlayerAssignments[guid].status || !g_IsNetworked)
-			Engine.GetGUIObjectByName("playerName[" + (g_PlayerAssignments[guid].player - 1) + "]").caption = '[color="' + g_ReadyColor + '"]' + translate(getSetting(pData, pDefs, "Name")) + '[/color]';
+			Engine.GetGUIObjectByName("playerName[" + (g_PlayerAssignments[guid].player - 1) + "]").caption = 
+				'[color="' + (g_PlayerAssignments[guid].status == 1 ? g_ReadyColor : g_StayReadyColor) + '"]' +
+				translate(getSetting(pData, pDefs, "Name")) + '[/color]';
 		else
 		{
 			Engine.GetGUIObjectByName("playerName[" + (g_PlayerAssignments[guid].player - 1) + "]").caption = translate(getSetting(pData, pDefs, "Name"));
@@ -1913,7 +1920,8 @@
 		let pData = g_GameAttributes.settings.PlayerData ? g_GameAttributes.settings.PlayerData[playerid] : {};
 		let pDefs = g_DefaultPlayerData ? g_DefaultPlayerData[playerid] : {};
 		if (isAI[playerid + 1])
-			Engine.GetGUIObjectByName("playerName[" + playerid + "]").caption = '[color="' + g_ReadyColor + '"]' + translate(getSetting(pData, pDefs, "Name")) + '[/color]';
+			Engine.GetGUIObjectByName("playerName[" + playerid + "]").caption =
+				'[color="' + g_StayReadyColor + '"]' + translate(getSetting(pData, pDefs, "Name")) + '[/color]';
 	}
 
 	// The host is not allowed to start until everyone is ready.
@@ -1950,7 +1958,7 @@
 		Engine.ClearAllPlayerReady();
 		setReady(true);
 	}
-	else
+	else if (g_IsReady != 2)
 		setReady(false, false);
 }
 
Index: source/network/NetServer.cpp
===================================================================
--- source/network/NetServer.cpp
+++ source/network/NetServer.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2016 Wildfire Games.
+/* Copyright (C) 2017 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -774,7 +774,8 @@
 void CNetServerWorker::ClearAllPlayerReady()
 {
 	for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it)
-		it->second.m_Status = 0;
+		if (it->second.m_Status != 2)
+			it->second.m_Status = 0;
 
 	SendPlayerAssignments();
 }