How to Find Lost Parts & Drone Parts | Stolen Experiment Vault Guide
Find both Lost Parts and all three HP-specific Drone Parts for the Stolen Experiment Vault, from the Volcano and Prehistoric bush locations to the limited bat reward.
To unlock the Stolen Experiment Vault, you must collect exactly 5 parts: two Lost Parts hidden in fixed biome locations and three Drone Parts dropped by specific Dr. Scramble drones. Completing the quest rewards a new limited bat.
This Lost Parts & Drone Parts | Stolen Experiment Vault guide shows where to search and how to use the invasion countdown efficiently. If you have not started the mission, first follow the How to Find Nibbles — Experiment #013 Secret guide.
Stolen Experiment Vault Parts Checklist
| Part | Required | Location or source |
|---|---|---|
| Lost Part #1 | 1 | Inside the volcano in the Volcano biome |
| Lost Part #2 | 1 | Behind the bush near the T-Rex in the Prehistoric biome |
| Drone Parts #1–#3 | 3 | Defeat the corresponding 3 HP, 5 HP, and 10 HP drones |
| Total | 5 | Return all five parts to the Stolen Experiment Vault |
Start the Quest in Abyss Ocean
Before collecting parts, travel to Abyss Ocean. On the left-hand side of the wall, find the cave entrance and go inside. Talk to Escaped Experiment #013 to begin the quest.
Lost Part #1: Inside the Volcano
Lost Part #1 is inside the volcano in the Volcano biome.
- Travel to the Volcano biome.
- Head toward the volcano itself rather than only searching the normal biome paths.
- Enter and explore the volcano interior.
- Look carefully for the Lost Part and interact with it to collect it.
The Volcano location image will be added here:
Lost Part #1 is located inside the volcano in the Volcano biome.
Lost Part #2: Behind the Prehistoric Bush
Lost Part #2 is behind the bush in the Prehistoric biome, close to the T-Rex.
- Travel to the Prehistoric biome.
- Locate the T-Rex area.
- Find the nearby bush and move behind it.
- Look for the Lost Part and interact with it to collect it.
The Prehistoric location image will be added here:
Lost Part #2 is behind the bush in Prehistoric, close to the T-Rex.
How to Get 3 Drone Parts
Each Drone Part is tied to a drone's HP. Defeat all three required drone types:
| Drone HP | Mission drop |
|---|---|
| 3 HP | Drone Part 1 |
| 5 HP | Drone Part 2 |
| 10 HP | Drone Part 3 |
Dr. Scramble's invasion schedule:
- Begins every 30 minutes.
- Starts simultaneously across all servers.
- Lasts for 5 minutes.
- Shows its countdown in the bottom-left corner of the game.
Watch the countdown and prepare before the invasion begins. During the five-minute event, search the map for the 3 HP, 5 HP, and 10 HP drones. Destroy each required type to obtain Drone Parts 1, 2, and 3. If you do not encounter or defeat every required drone during one invasion, continue during the next synchronized event.
Read the Dr. Scramble Secret Experiment event guide for the invasion loop, Samples, and Experiment Shop rewards.
Return to the Stolen Experiment Vault
After collecting both Lost Parts and all three Drone Parts:
- Return to the Experiment #013 secret area.
- Approach the Stolen Experiment Vault.
- Confirm that your mission shows all five required parts.
- Follow the vault interaction prompt to install or submit them.
- Complete the quest and claim the new limited bat reward.
Do not confuse Samples with Drone Parts. Samples are the Experiment Shop currency, while Drone Parts are mission components required by the vault.
Lost Parts & Drone Parts Tips
- Collect the fixed Lost Parts during the downtime between invasions.
- Collect Lost Part #1 inside the Volcano, then find Lost Part #2 behind the Prehistoric bush near the T-Rex.
- Be ready before the invasion countdown reaches zero.
- Target the correct drone HP: 3 HP for Part 1, 5 HP for Part 2, and 10 HP for Part 3.
- Check mission progress before returning to the vault.
- Use the Steal an Egg Speed guide if moving between distant biomes is slowing down your search.
Lost Parts & Drone Parts FAQ
Where is the Prehistoric Lost Part?
It is Lost Part #2, located behind the bush near the T-Rex in the Prehistoric biome. Use the location image above to identify the exact area after it is uploaded.
Where is the Volcano Lost Part?
It is Lost Part #1, located inside the volcano in the Volcano biome. Search the volcano interior rather than only following the normal route through the biome.
Which drones drop Drone Parts 1, 2, and 3?
Drone HP determines the mission part: a 3 HP drone drops Drone Part 1, a 5 HP drone drops Drone Part 2, and a 10 HP drone drops Drone Part 3.
How many Drone Parts do I need?
You need three Drone Parts, plus the two fixed Lost Parts, for a total of five Stolen Experiment Vault components.
When can I farm Drone Parts?
Farm them during the synchronized Dr. Scramble invasion, which begins every 30 minutes and remains active for five minutes. The bottom-left countdown shows the next start.
Where do I take all five parts?
Return them to the Stolen Experiment Vault in the Experiment #013 secret area. The Nibbles guide explains how to reach the mission area.
What is the Stolen Experiment Vault reward?
Completing the five-part quest rewards a new limited bat.