diff --git a/src/Alias.js b/src/Alias.js
index 071b50bef..da6be05b6 100644
--- a/src/Alias.js
+++ b/src/Alias.js
@@ -1,5 +1,6 @@
 /* Alias.js */
 Aliases = {};
+GlobalAliases = {};
 
 //Print all aliases to terminal
 function printAliases() {
@@ -8,21 +9,40 @@ function printAliases() {
             post("alias " + name + "=" + Aliases[name]);
         }
     }
+    for (var name in GlobalAliases) {
+        if (GlobalAliases.hasOwnProperty(name)) {
+            post("global alias " + name + "=" + GlobalAliases[name]);
+        }
+    }
 }
 
 //True if successful, false otherwise
-function parseAliasDeclaration(dec) {
-    var re = /([^=]+)="(.+)"/;
+function parseAliasDeclaration(dec,global=false) {
+    var re = /^([_|\w|!|%|,|@]+)="(.+)"$/;
     var matches = dec.match(re);
     if (matches == null || matches.length != 3) {return false;}
-    addAlias(matches[1], matches[2]);
+    if (global){
+        addGlobalAlias(matches[1],matches[2]);
+    } else {
+        addAlias(matches[1], matches[2]);
+    }
     return true;
 }
 
 function addAlias(name, value) {
+    if (name in GlobalAliases){
+        delete GlobalAliases[name];
+    }
     Aliases[name] = value;
 }
 
+function addGlobalAlias(name, value) {
+    if (name in Aliases){
+        delete Aliases[name];
+    }
+    GlobalAliases[name] = value;
+}
+
 function getAlias(name) {
     if (Aliases.hasOwnProperty(name)) {
         return Aliases[name];
@@ -30,6 +50,13 @@ function getAlias(name) {
     return null;
 }
 
+function getGlobalAlias(name) {
+    if (GlobalAliases.hasOwnProperty(name)) {
+        return GlobalAliases[name];
+    }
+    return null;
+}
+
 function removeAlias(name) {
     if (Aliases.hasOwnProperty(name)) {
         delete Aliases[name];
@@ -42,10 +69,21 @@ function removeAlias(name) {
 //Aliases only applied to "whole words", one level deep
 function substituteAliases(origCommand) {
     var commandArray = origCommand.split(" ");
-    for (var i = 0; i < commandArray.length; ++i) {
-        var alias = getAlias(commandArray[i]);
+    if (commandArray.length>0){
+        var alias = getAlias(commandArray[0]);
         if (alias != null) {
-            commandArray[i] = alias;
+            commandArray[0] = alias;
+        } else {
+            var alias = getGlobalAlias(commandArray[0]);
+            if (alias != null) {
+                commandArray[0] = alias;
+            }
+        }
+        for (var i = 0; i < commandArray.length; ++i) {
+            var alias = getGlobalAlias(commandArray[i]);
+            if (alias != null) {
+                commandArray[i] = alias;
+            }
         }
     }
     return commandArray.join(" ");
diff --git a/src/SaveObject.js b/src/SaveObject.js
index 0e40f4f43..c098d9332 100644
--- a/src/SaveObject.js
+++ b/src/SaveObject.js
@@ -10,6 +10,7 @@ function BitburnerSaveObject() {
     this.FactionsSave               = "";
     this.SpecialServerIpsSave       = "";
     this.AliasesSave                = "";
+    this.GlobalAliasesSave          = "";
     this.MessagesSave               = "";
     this.StockMarketSave            = "";
     this.VersionSave                = "";
@@ -36,6 +37,7 @@ BitburnerSaveObject.prototype.saveGame = function() {
     this.FactionsSave               = JSON.stringify(Factions);
     this.SpecialServerIpsSave       = JSON.stringify(SpecialServerIps);
     this.AliasesSave                = JSON.stringify(Aliases);
+    this.GlobalAliasesSave          = JSON.stringify(GlobalAliases);
     this.MessagesSave               = JSON.stringify(Messages);
     this.StockMarketSave            = JSON.stringify(StockMarket);
     this.VersionSave                = JSON.stringify(CONSTANTS.Version);
@@ -69,6 +71,15 @@ loadGame = function(saveObj) {
     } else {
         Aliases = {};
     }
+    if (saveObj.hasOwnProperty("GlobalAliasesSave")) {
+        try {
+            GlobalAliases   = JSON.parse(saveObj.GlobalAliasesSave, Reviver);
+        } catch(e) {
+            GlobalAliases = {};
+        }
+    } else {
+        GlobalAliases = {};
+    }
     if (saveObj.hasOwnProperty("MessagesSave")) {
         try {
             Messages        = JSON.parse(saveObj.MessagesSave, Reviver);
@@ -129,6 +140,7 @@ loadImportedGame = function(saveObj, saveString) {
     var tempSpecialServerIps = null;
     var tempAugmentations = null;
     var tempAliases = null;
+    var tempGlobalAliases = null;
     var tempMessages = null;
     var tempStockMarket = null;
     try {
@@ -151,6 +163,15 @@ loadImportedGame = function(saveObj, saveString) {
         } else {
             tempAliases = {};
         }
+        if (tempSaveObj.hasOwnProperty("GlobalAliases")) {
+            try {
+                tempGlobalAliases   = JSON.parse(tempSaveObj.AliasesSave, Reviver);
+            } catch(e) {
+                tempGlobalAliases = {};
+            }
+        } else {
+            tempGlobalAliases = {};
+        }
         if (tempSaveObj.hasOwnProperty("MessagesSave")) {
             try {
                 tempMessages        = JSON.parse(tempSaveObj.MessagesSave, Reviver);
@@ -215,6 +236,10 @@ loadImportedGame = function(saveObj, saveString) {
         Aliases             = tempAliases;
     }
     
+    if (tempGlobalAliases) {
+        GlobalAliases             = tempGlobalAliases;
+    }
+    
     if (tempMessages) {
         Messages            = tempMessages;
     }
@@ -291,6 +316,7 @@ BitburnerSaveObject.prototype.exportGame = function() {
     this.SpecialServerIpsSave       = JSON.stringify(SpecialServerIps);
     this.AugmentationsSave          = JSON.stringify(Augmentations);
     this.AliasesSave                = JSON.stringify(Aliases);
+    this.GlobalAliasesSave          = JSON.stringify(GlobalAliasesSave);
     this.MessagesSave               = JSON.stringify(Messages);
     this.VersionSave                = JSON.stringify(CONSTANTS.Version);
     
diff --git a/src/Terminal.js b/src/Terminal.js
index f7ac380f7..f8abeaf97 100644
--- a/src/Terminal.js
+++ b/src/Terminal.js
@@ -243,7 +243,7 @@ function determineAllPossibilitiesForTabCompletion(input, index=0) {
         return ["alias", "analyze", "cat", "check", "clear", "cls", "connect", "free", 
                 "hack", "help", "home", "hostname", "ifconfig", "kill", "killall",
                 "ls", "mem", "nano", "ps", "rm", "run", "scan", "scan-analyze", 
-                "scp", "sudov", "tail", "theme", "top"].concat(Object.keys(Aliases));
+                "scp", "sudov", "tail", "theme", "top"].concat(Object.keys(Aliases)).concat(Object.keys(GlobalAliases));
     }
     
     if (input.startsWith ("buy ")) {
@@ -581,15 +581,18 @@ var Terminal = {
             case "alias":
                 if (commandArray.length == 1) {
                     printAliases();
-                } else if (commandArray.length == 2) {
-                    if (parseAliasDeclaration(commandArray[1])) {
-                        
-                    } else {
-                        post('Incorrect usage of alias command. Usage: alias [aliasname="value"]'); return;
-                    }
-                } else {
-                    post('Incorrect usage of alias command. Usage: alias [aliasname="value"]'); return;
+                    return;
                 }
+                if (commandArray.length == 2 ) {
+                    var args = commandArray[1].split(" ");
+                    if (args.length == 1 && parseAliasDeclaration(args[0])){
+                        return;
+                    }
+                    if (args.length == 2 && args[0] == "-g" && parseAliasDeclaration(args[1],true)){
+                        return;
+                    }
+                }
+                post('Incorrect usage of alias command. Usage: alias [aliasname="value"]'); 
                 break;
 			case "analyze":
 				if (commandArray.length != 1) {