Index: binaries/data/mods/public/gui/lobby/lobby.js
===================================================================
--- binaries/data/mods/public/gui/lobby/lobby.js
+++ binaries/data/mods/public/gui/lobby/lobby.js
@@ -88,7 +88,12 @@
 /**
  * All games currently running.
  */
-var g_GameList = {};
+var g_GameList = { "uninitialized": true };
+
+/**
+ * Filtered and sorted list of currently running games.
+ */
+var g_GameListPrevious = [];
 
 /**
  * Used to restore the selection after updating the playerlist.
@@ -273,6 +278,8 @@
 	},
 	"game": {
 		"gamelist": msg => {
+			if (g_GameList.uninitialized)
+				g_GameList = { "initial": true };
 			updateGameList();
 			return false;
 		},
@@ -894,6 +901,9 @@
  */
 function updateGameList()
 {
+	if (g_GameList.uninitialized)
+		return;
+
 	let gamesBox = Engine.GetGUIObjectByName("gamesBox");
 	let sortBy = gamesBox.selected_column;
 	let sortOrder = gamesBox.selected_column_order;
@@ -904,13 +914,25 @@
 		g_SelectedGamePort = g_GameList[gamesBox.selected].port;
 	}
 
-	g_GameList = Engine.GetGameList().map(game => {
+	let previousGameIndex = 0;
+	g_GameListPrevious = Engine.GetGameList().map(game => {
+		let previousGame = g_GameListPrevious[previousGameIndex] && g_GameListPrevious[previousGameIndex].name == game.name ?
+			g_GameListPrevious[previousGameIndex++] : g_GameListPrevious.find(
+				(previousGame, foundPreviousGameIndex) => previousGame.name == game.name && (previousGameIndex = ++foundPreviousGameIndex)
+		);
+
+		game.joinedBuddies = previousGame ? previousGame.joinedBuddies : [];
 
 		game.hasBuddies = 0;
 
 		// Compute average rating of participating players
 		let playerRatings = [];
 
+		let buddyJoined = nick => g_Buddies.indexOf(nick) != -1 && game.joinedBuddies.indexOf(nick) == -1 && game.joinedBuddies.push(nick);
+
+		if (game.state == "init" && buddyJoined(game.hostUsername) && !g_GameList.initial)
+				addInfoBuddyJoinedGame(translate("%(buddy)s has opened new game %(game)s."), game, game.hostUsername);
+
 		for (let player of stringifiedTeamListToPlayerData(game.players))
 		{
 			let [nick, rating] = splitRatingFromNick(player.Name);
@@ -921,6 +943,9 @@
 			// Sort games with playing buddies above games with spectating buddies
 			if (game.hasBuddies < 2 && g_Buddies.indexOf(nick) != -1)
 				game.hasBuddies = player.Team == "observer" ? 1 : 2;
+
+			if (buddyJoined(playerNickRating.nick) && !g_GameList.initial)
+					addInfoBuddyJoinedGame(translate("%(buddy)s has joined game %(game)s."), game, playerNickRating.nick);
 		}
 
 		game.gameRating =
@@ -929,7 +954,9 @@
 				g_DefaultLobbyRating;
 
 		return game;
-	}).filter(game => !filterGame(game)).sort((a, b) => {
+	});
+
+	g_GameList = g_GameListPrevious.filter(game => !filterGame(game)).sort((a, b) => {
 		let sortA, sortB;
 		switch (sortBy)
 		{
@@ -1287,6 +1314,15 @@
 	Engine.GetGUIObjectByName("chatText").caption = g_ChatMessages.join("\n");
 }
 
+function addInfoBuddyJoinedGame(text, game, nickName)
+{
+	addChatMessage({ "info": true, "text": sprintf(text, {
+		"buddy": coloredText(g_BuddySymbol + " " + nickName, getPlayerColor(nickName)),
+		"game": coloredText(g_BuddySymbol + " " + game.name, g_GameColors[game.state])
+		})
+	});
+}
+
 /**
  * Splits given input into command and argument.
  */
@@ -1371,6 +1407,10 @@
 			return "";
 		}
 	}
+	else if (msg.info)
+		formattedMessage = sprintf(translate("%(info)s"), {
+			"info": senderFont('* ') + msg.text
+		});
 	else
 	{
 		let senderString;