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
@@ -996,6 +996,7 @@
 	g_GameList = Engine.GetGameList().map(game => {
 
 		game.hasBuddies = 0;
+		game.observersCount = 0;
 
 		// Compute average rating of participating players
 		let playerRatings = [];
@@ -1006,6 +1007,8 @@
 
 			if (player.Team != "observer")
 				playerRatings.push(playerNickRating.rating || g_DefaultLobbyRating);
+			else
+				++game.observersCount;
 
 			// Sort games with playing buddies above games with spectating buddies
 			if (game.hasBuddies < 2 && g_Buddies.indexOf(playerNickRating.nick) != -1)
@@ -1072,6 +1075,7 @@
 	let list = [];
 	let list_data = [];
 	let selectedGameIndex = -1;
+	let observerFmt = translate("+%(count)s");
 
 	for (let i in g_GameList)
 	{
@@ -1082,12 +1086,18 @@
 		if (game.ip == g_SelectedGameIP && game.port == g_SelectedGamePort)
 			selectedGameIndex = +i;
 
+		let playerText = game.nbp + "/" + game.maxnbp;
+		if (game.observersCount > 0)
+			playerText += " " + coloredText(sprintf(observerFmt, {
+				"count": game.observersCount
+			}), "gray");
+
 		list_buddy.push(game.hasBuddies ? coloredText(g_BuddySymbol, g_GameColors[game.state]) : "");
 		list_name.push(coloredText(gameName, g_GameColors[game.state]));
 		list_mapName.push(translateMapTitle(game.niceMapName));
 		list_mapSize.push(translateMapSize(game.mapSize));
 		list_mapType.push(g_MapTypes.Title[mapTypeIdx] || "");
-		list_nPlayers.push(game.nbp + "/" + game.maxnbp);
+		list_nPlayers.push(playerText);
 		list_gameRating.push(game.gameRating);
 		list.push(gameName);
 		list_data.push(i);