diff --git a/README.md b/README.md
new file mode 100644
index 0000000..24a8783
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# Screeps Typescript Starter
+
+Screeps Typescript Starter is a starting point for a Screeps AI written in Typescript. It provides everything you need to start writing your AI whilst leaving `main.ts` as empty as possible.
+
+## Usage
+
+You will need:
+
+ - Node.JS (Latest LTS is recommended)
+ - A Package Manager (Yarn or NPM)
+
+Download the latest source [here](https://github.com/screepers/screeps-typescript-starter/archive/v3.0.zip) and extract it to a folder.
+
+Open the folder in your terminal and run `npm install` (or `yarn`) to install the dependencies.
+
+Fire up your preferred editor with typescript installed and you are good to go!
+
+## Typings
+
+The typings for Screeps comes from [typed-screeps](https://github.com/screepers/typed-screeps), if you have an issue with incorrect typings open an issue there.
diff --git a/src/main.ts b/src/main.ts
index 4ac5de3..67efd57 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,3 +1,11 @@
 export function loop() {
+
+  // Clear non-existing creep memory.
+  for(let name in Memory.creeps) {
+    if(!Game.creeps[name]) {
+      delete Memory[name];
+    }
+  }
+
   console.log(`Current tick is ${Game.time}`);
 }