diff --git a/src/Constants.js b/src/Constants.js
index fb63dd449..982abedda 100644
--- a/src/Constants.js
+++ b/src/Constants.js
@@ -165,11 +165,11 @@ CONSTANTS = {
                 "kill [script]          Stops a script that is running on the current machine<br>" +
                 "killall                Stops all running scripts on the current machine<br>" + 
                 "ls                     Displays all programs and scripts on the machine<br>" +
-                "mem [script]           Displays the amount of RAM the script requires to run<br>" + 
+                "mem [script] [-t] [n]  Displays the amount of RAM the script requires to run with n threads<br>" + 
                 "nano [script]          Text editor - Open up and edit a script<br>" + 
                 "ps                     Display all scripts that are currently running<br>" + 
                 "rm                     Delete a script/program from the machine. (WARNING: Permanent)<br>" + 
-                "run [script/program]   Execute a program or a script<br>" + 
+                "run [name] [-t] [n]    Execute a program or a script with n threads<br>" + 
                 "scan                   Displays all available network connections<br>" +
                 "scan-analyze [depth]   Displays hacking-related information for all servers up to <i>depth</i> nodes away<br>" + 
                 "scp [script] [server]  Copies a script to a destination server (specified by ip or hostname)<br>" + 
@@ -652,6 +652,8 @@ CONSTANTS = {
     "-You can now see what an Augmentation does and its price even while its locked<br><br>",
     
     LatestUpdate: 
+    "v0.20.2<br>" + 
+    ""
     "v0.20.1<br>" + 
     "-Fixed bug where sometimes scripts would crash without showing the error<br>" + 
     "-Added Deepscan programs to Dark Web<br>" + 
diff --git a/src/NetscriptEvaluator.js b/src/NetscriptEvaluator.js
index 9d56b71e2..c384f33f0 100644
--- a/src/NetscriptEvaluator.js
+++ b/src/NetscriptEvaluator.js
@@ -6,8 +6,6 @@
 //wait for that promise to finish before continuing
 function evaluate(exp, workerScript) {
     return new Promise(function(resolve, reject) {
-    var threads = workerScript.scriptRef.threads;
-    if (isNaN(threads) || threads < 1) {threads = 1;}
 	var env = workerScript.env;
     if (env.stopFlag) {return reject(workerScript);}
     if (exp == null) {
@@ -260,18 +258,29 @@ function evaluate(exp, workerScript) {
                         reject(e);
                     });
                 } else if (exp.func.value == "run") {
-                    if (exp.args.length != 1) {
-                        return reject(makeRuntimeRejectMsg(workerScript, "run() call has incorrect number of arguments. Takes 1 argument"));
+                    if (exp.args.length != 1 && exp.args.length != 2) {
+                        return reject(makeRuntimeRejectMsg(workerScript, "run() call has incorrect number of arguments. Takes 1 or 2 arguments"));
                     }
-                    var scriptNamePromise = evaluate(exp.args[0], workerScript);
-                    scriptNamePromise.then(function(scriptname) {
+                    var argPromises = exp.args.map(function(arg) {
+                        return evaluate(arg, workerScript);
+                    });
+                    
+                    Promise.all(argPromises).then(function(args) {
                         if (env.stopFlag) {return reject(workerScript);}
+                        var scriptname = args[0];
+                        var threads = 1;
+                        if (exp.args.length == 2) {
+                            threads = args[1];
+                        }
+                        if (isNaN(threads) || threads < 1) {
+                            return reject(makeRuntimeRejectMsg(workerScript, "Invalid argument for thread count passed into run(). Must be numeric and greater than 0"));
+                        }
                         var scriptServer = getServer(workerScript.serverIp);
                         if (scriptServer == null) {
                             return reject(makeRuntimeRejectMsg(workerScript, "Could not find server. This is a bug in the game. Report to game dev"));
                         }
                         
-                        var runScriptPromise = runScriptFromScript(scriptServer, scriptname, workerScript);
+                        var runScriptPromise = runScriptFromScript(scriptServer, scriptname, workerScript, threads);
                         return runScriptPromise;
                     }).then(function(res) {
                         resolve(res);
@@ -279,7 +288,7 @@ function evaluate(exp, workerScript) {
                         reject(e);
                     });
                 } else if (exp.func.value == "exec") {
-                    if (exp.args.length != 2) {
+                    if (exp.args.length != 2 && exp.args.length != 3) {
                         return reject(makeRuntimeRejectMsg(workerScript, "exec() call has incorrect number of arguments. Takes 2 arguments"));
                     }
                     var argPromises = exp.args.map(function(arg) {
@@ -288,12 +297,19 @@ function evaluate(exp, workerScript) {
                     
                     Promise.all(argPromises).then(function(args) {
                         if (env.stopFlag) {return reject(workerScript);}
+                        var threads = 1;
+                        if (exp.args.length == 3) {
+                            threads = args[2];
+                        }
+                        if (isNaN(threads) || threads < 1) {
+                            return reject(makeRuntimeRejectMsg(workerScript, "Invalid argument for thread count passed into exec(). Must be numeric and greater than 0"));
+                        }
                         var server = getServer(args[1]);
                         if (server == null) {
                             return reject(makeRuntimeRejectMsg(workerScript, "Invalid hostname/ip passed into exec() command: " + args[1]));
                         }
                         
-                        return runScriptFromScript(server, args[0], workerScript); 
+                        return runScriptFromScript(server, args[0], workerScript, threads); 
                     }).then(function(res) {
                         resolve(res);
                     }).catch(function(e) {
@@ -925,7 +941,7 @@ function apply_op(op, a, b) {
 }
 
 //Run a script from inside a script using run() command
-function runScriptFromScript(server, scriptname, workerScript) {
+function runScriptFromScript(server, scriptname, workerScript, threads=1) {
     return new Promise(function(resolve, reject) {
         var env = workerScript.env;
         if (env.stopFlag) {reject(workerScript); return;}
@@ -944,6 +960,7 @@ function runScriptFromScript(server, scriptname, workerScript) {
                 if (server.scripts[i].filename == scriptname) {
                     //Check for admin rights and that there is enough RAM availble to run
                     var ramUsage = server.scripts[i].ramUsage;
+                    ramUsage = ramUsage * threads * Math.pow(1.02, threads-1);
                     var ramAvailable = server.maxRam - server.ramUsed;
                     
                     if (server.hasAdminRights == false) {
@@ -951,13 +968,14 @@ function runScriptFromScript(server, scriptname, workerScript) {
                         resolve(false);
                         return;
                     } else if (ramUsage > ramAvailable){
-                        workerScript.scriptRef.log("Cannot run script " + scriptname + " on " + server.hostname + " because there is not enough available RAM!");
+                        workerScript.scriptRef.log("Cannot run script " + scriptname + "(t=" + threads + ") on " + server.hostname + " because there is not enough available RAM!");
                         resolve(false);
                         return;
                     } else {
                         //Able to run script
-                        workerScript.scriptRef.log("Running script: " + scriptname + " on " + server.hostname + ". May take a few seconds to start up...");
+                        workerScript.scriptRef.log("Running script: " + scriptname + " on " + server.hostname + " with " + threads + " threads. May take a few seconds to start up...");
                         var script = server.scripts[i];
+                        script.threads = threads;
                         server.runningScripts.push(script.filename);	//Push onto runningScripts
                         addWorkerScript(script, server);
                         resolve(true);
diff --git a/src/engine.js b/src/engine.js
index c92d5865d..809937fd3 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -507,7 +507,7 @@ var Engine = {
         updateSkillLevelsCounter: 10,       //Only update skill levels every 2 seconds. Might improve performance
         updateDisplays: 3,                  //Update displays such as Active Scripts display and character display
         createProgramNotifications: 10,     //Checks whether any programs can be created and notifies
-        checkFactionInvitations: 250,       //Check whether you qualify for any faction invitations every 5 minutes
+        checkFactionInvitations: 100,       //Check whether you qualify for any faction invitations every 5 minutes
         passiveFactionGrowth: 600,
         messages: 300,
     },
@@ -567,7 +567,7 @@ var Engine = {
                 var randFaction = invitedFactions[Math.floor(Math.random() * invitedFactions.length)];
                 inviteToFaction(randFaction);
             }
-            Engine.Counters.checkFactionInvitations = 250;
+            Engine.Counters.checkFactionInvitations = 100;
         }
         
         if (Engine.Counters.passiveFactionGrowth <= 0) {