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
@@ -2425,5 +2425,7 @@
 			autocomplete[priority] = (autocomplete[priority] || []).concat(dropdown[name].labels());
 		}
 
+	autocomplete["120"] = Object.keys(g_NetworkCommands).sort();
+
 	g_Autocomplete = Object.keys(autocomplete).sort().reverse().reduce((all, priority) => all.concat(autocomplete[priority]), []);
 }
Index: binaries/data/mods/public/gui/lobby/lobby_panels.xml
===================================================================
--- binaries/data/mods/public/gui/lobby/lobby_panels.xml
+++ binaries/data/mods/public/gui/lobby/lobby_panels.xml
@@ -259,7 +259,8 @@
 			<object name="chatInput" size="0 94% 100% 100%" type="input" style="ModernInput" font="sans-13">
 				<action on="Press">submitChatInput();</action>
 				<action on="Tab">
-					autoCompleteNick(this, Engine.GetPlayerList().map(player => player.name));
+					autoCompleteNick(this, Engine.GetPlayerList().map(player => player.name).concat(
+						Object.keys(g_ChatCommands).sort().map(com => { return "/" + com; })));
 				</action>
 			</object>
 		</object>
Index: binaries/data/mods/public/gui/session/chat_window.xml
===================================================================
--- binaries/data/mods/public/gui/session/chat_window.xml
+++ binaries/data/mods/public/gui/session/chat_window.xml
@@ -72,7 +72,7 @@
 				let playernames = [];
 				for (let player in g_PlayerAssignments)
 					playernames.push(g_PlayerAssignments[player].name);
-				autoCompleteNick(this, playernames);
+				autoCompleteNick(this, playernames.concat(Object.keys(g_NetworkCommands).sort()));
 			</action>
 		</object>