diff --git a/src/serialization/serialize-assets.js b/src/serialization/serialize-assets.js
index c1d063949..35c82adbd 100644
--- a/src/serialization/serialize-assets.js
+++ b/src/serialization/serialize-assets.js
@@ -50,7 +50,21 @@ const serializeCostumes = function (runtime, optTargetId) {
     return serializeAssets(runtime, 'costumes', optTargetId);
 };
 
+/*
+ * Return all costumes and sounds in the provided runtime
+ * @param {Runtime} runtime
+ * @returns {Array<object>} An array of costumes and sounds
+ */
+const collectAssets = function (runtime) {
+    return runtime.targets.reduce((acc, target) => (
+        acc
+            .concat(target.sprite.sounds.map(sound => sound.asset))
+            .concat(target.sprite.costumes.map(costume => costume.asset))
+    ), []);
+};
+
 module.exports = {
+    collectAssets,
     serializeSounds,
     serializeCostumes
 };
diff --git a/src/virtual-machine.js b/src/virtual-machine.js
index b7659dd31..798078f2a 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -18,7 +18,7 @@ const Variable = require('./engine/variable');
 
 const {loadCostume} = require('./import/load-costume.js');
 const {loadSound} = require('./import/load-sound.js');
-const {serializeSounds, serializeCostumes} = require('./serialization/serialize-assets');
+const {collectAssets, serializeSounds, serializeCostumes} = require('./serialization/serialize-assets');
 require('canvas-toBlob');
 
 const RESERVED_NAMES = ['_mouse_', '_stage_', '_edge_', '_myself_', '_random_'];
@@ -336,6 +336,13 @@ class VirtualMachine extends EventEmitter {
         });
     }
 
+    /*
+     * @type {Array<object>} Array of all costumes and sounds currently in the runtime
+     */
+    get assets () {
+        return collectAssets(this.runtime);
+    }
+
     _addFileDescsToZip (fileDescs, zip) {
         for (let i = 0; i < fileDescs.length; i++) {
             const currFileDesc = fileDescs[i];
diff --git a/test/unit/vm_collectAssets.js b/test/unit/vm_collectAssets.js
new file mode 100644
index 000000000..2fcab59be
--- /dev/null
+++ b/test/unit/vm_collectAssets.js
@@ -0,0 +1,42 @@
+const test = require('tap').test;
+
+const {collectAssets} = require('../../src/serialization/serialize-assets');
+
+const RenderedTarget = require('../../src/sprites/rendered-target');
+const Sprite = require('../../src/sprites/sprite');
+const VirtualMachine = require('../../src/virtual-machine');
+
+test('spec', t => {
+    t.type(collectAssets, 'function');
+    t.end();
+});
+
+test('collectAssets', t => {
+    const vm = new VirtualMachine();
+    const sprite = new Sprite(null, vm.runtime);
+    const target = new RenderedTarget(sprite, vm.runtime);
+    vm.runtime.targets = [target];
+    const [
+        soundAsset1,
+        soundAsset2,
+        costumeAsset1
+    ] = [{assetId: 1}, {assetId: 2}, {assetId: 3}];
+    sprite.sounds = [{id: 1, asset: soundAsset1}, {id: 2, asset: soundAsset2}];
+    sprite.costumes = [{id: 1, asset: costumeAsset1}];
+    const assets = collectAssets(vm.runtime);
+    t.deepEqual(assets, [soundAsset1, soundAsset2, costumeAsset1]);
+    t.end();
+});
+
+test('getter', t => {
+    const vm = new VirtualMachine();
+    const sprite = new Sprite(null, vm.runtime);
+    const target = new RenderedTarget(sprite, vm.runtime);
+    vm.runtime.targets = [target];
+    sprite.sounds = [{id: 1, asset: {}}, {id: 2, asset: {}}];
+    sprite.costumes = [{id: 1, asset: {}}];
+    const assets = vm.assets;
+    t.type(assets.length, 'number');
+    t.equal(assets.length, 3);
+    t.end();
+});