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
@@ -295,6 +295,21 @@
  * A handler returns true if the user input should be sent as a chat message.
  */
 var g_ChatCommands = {
+	"list": {
+		"description": translate("List users."),
+		"handler": args => {
+			let users = Engine.GetPlayerList().map(player => player.name);
+			addChatMessage({
+				"from": "Users (" + users.length + ")",
+				"text": users.sort((a,b) => {
+					if (a.toLowerCase() < b.toLowerCase()) return -1;
+					if (a.toLowerCase() > b.toLowerCase()) return +1;
+					return 0;
+			}).map(player => colorPlayerName(player)).join(", ")
+			});
+			return false;
+		}
+	},
 	"away": {
 		"description": translate("Set your state to 'Away'."),
 		"handler": args => {