diff --git a/src/engine/runtime.js b/src/engine/runtime.js
index e8b9c52d..d8956586 100644
--- a/src/engine/runtime.js
+++ b/src/engine/runtime.js
@@ -409,6 +409,8 @@ class Runtime extends EventEmitter {
             warpTimer: false
         };
 
+        this.debug = false;
+
         this._animationFrame = this._animationFrame.bind(this);
         this._animationFrameId = null;
         this._lastStepTime = Date.now();
@@ -2387,6 +2389,11 @@ class Runtime extends EventEmitter {
         });
     }
 
+    enableDebug () {
+        this.resetAllCaches();
+        this.debug = true;
+    }
+
     /**
      * Emit glows/glow clears for scripts after a single tick.
      * Looks at `this.threads` and notices which have turned on/off new glows.
diff --git a/src/virtual-machine.js b/src/virtual-machine.js
index 89708d55..f97b2b00 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -252,6 +252,10 @@ class VirtualMachine extends EventEmitter {
         this.runtime.setCompilerOptions(compilerOptions);
     }
 
+    enableDebug () {
+        this.runtime.enableDebug();
+    }
+
     /**
      * Stop all threads and running activities.
      */