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.observersNumber = 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.observersNumber++;
 
 			// Sort games with playing buddies above games with spectating buddies
 			if (game.hasBuddies < 2 && g_Buddies.indexOf(playerNickRating.nick) != -1)
@@ -1087,7 +1090,10 @@
 		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(
+			game.nbp + "/" + game.maxnbp +
+				(game.observersNumber > 0 ? ' [color="190 160 70"](' + game.observersNumber + ')[/color]' : '' )
+		);
 		list_gameRating.push(game.gameRating);
 		list.push(gameName);
 		list_data.push(i);