Resident Evil 9 Blood Research Lab Complete Puzzle Guide: All 3 Blood Samples & Every Crafting Recip

Running out of ammo in Resident Evil 9 because you missed the crafting recipes hidden in the Blood Research Lab? That stops now. This lab holds three separate laser microscope puzzles, not just one. Miss any sample and you lose access to handgun ammo, hemolytic injectors, steroids, stabilizers, medical syringes, and the exclusive Requiem ammo forever. This guide drops every laser microscope solution immediately, then maps the exact route to collect all three blood samples from the side cubicle, storage room, and main lab. Grab your Level 1 ID wristband, follow this path once, and unlock every crafting recipe in a single sweep.

• Instant Unlock: All Laser Microscope Solutions

• Part 1: Main Lab Purple Sample - Handgun Ammo & Hemolytic Injector

• Part 2: Side Cubicle Sample - Steroids & Stabilizer Recipes

• Part 3: Storage Room Sample - Medical Syringe & Requiem Ammo

• Access Requirement: Level 1 ID Wristband

• Full Collection Route: All Three Samples in One Run

• Key Item Locations Checklist

• Combat Crafting Guide: What Each Recipe Does

Instant Unlock: All Laser Microscope Solutions

Here are all three solutions upfront. Each requires inserting the specific blood sample into the laser microscope, then activating all atoms in one move.

1. Main Lab Purple Sample: Unlocks Handgun Ammo and Hemolytic Injector synthesis.

2. Side Cubicle Sample: Unlocks Steroids and Stabilizer synthesis.

3. Storage Room Sample: Unlocks Medical Syringe and Requiem Ammo (12.7x55mm) synthesis.

Critical warning: You cannot craft steroids or stabilizers yet after unlocking them. Your Blood Collector capacity is insufficient at this stage. You need to upgrade the device later before returning to synthesize these advanced items.

Access Requirement: Level 1 ID Wristband

None of these rooms open without the Level 1 ID Wristband. Once you equip this item, four previously locked Level 1 doors on the first floor become accessible. This includes both the side cubicle near the Blood Research Lab and the storage room beside the waiting area. Do not attempt this section until you possess this wristband.

Part 1: Main Lab Purple Sample - Handgun Ammo & Hemolytic Injector

Step 1. Enter East Reception and Secure the Collectible

Swipe your Level 1 access card. Enter the East Reception Room. Walk straight to the counter. Grab Monochrome Mr. Raccoon 2/25 for your collection progress.

Step 2. Grab the Hemolytic Injector

Move into the Examination Room. Open the supply cabinet. Collect the Hemolytic Injector immediately. This tool changes combat completely.

Step 3. Secure Lab Tools

Enter the Blood Research Lab main room. Check the workbench. Pick up the Blood Collector and study the blood compound synthesis chart. Infected blood locations now appear automatically on your map.

Step 4. Solve the First Microscope Puzzle

Locate the purple blood sample beside the laser microscope. Insert it into the analysis chamber. Activate every atom simultaneously in one move. The machine registers the complete pattern instantly.

Part 2: Side Cubicle Sample - Steroids & Stabilizer Recipes

Step 5. Enter the Side Cubicle Near Blood Research Lab

Exit the main lab. Enter the small side cubicle adjacent to the Blood Research Lab. Search the room thoroughly. You find three critical items here:

1. Victor's Journal. Lore item revealing backstory.

2. Empty Syringe. Component for future crafting.

3. Blood Sample. The key to unlocking steroids and stabilizers.

Step 6. Analyze the Second Sample

Return to the Blood Research Lab laser microscope. Insert the blood sample from the side cubicle. Activate all atoms in one move again. You unlock Steroid Synthesis Recipe and Stabilizer Synthesis Recipe.

Remember: Your Blood Collector capacity is currently insufficient. You cannot craft these items yet. The recipes stay unlocked permanently. Return after upgrading your equipment.

Part 3: Storage Room Sample - Medical Syringe & Requiem Ammo

Step 7. Clear the Waiting Area Storage Room

Navigate to the storage room beside the waiting area. Use your Level 1 ID wristband to unlock the door. Inside, search the shelves immediately. You find the third Blood Sample sitting on the surface.

Step 8. Final Microscope Analysis

Return to the laser microscope one final time. Insert the storage room blood sample. Activate all atoms simultaneously. You unlock the Medical Syringe Synthesis Recipe and the rare Requiem Ammo (12.7x55mm) Synthesis Recipe. This specialty ammunition deals massive damage to specific enemy types later in the game.

Full Collection Route: All Three Samples in One Run

Follow this exact sequence to minimize backtracking:

1. Start at East Reception. Grab Mr. Raccoon.

2. Move through Examination Room. Collect Hemolytic Injector.

3. Enter Blood Research Lab main room. Grab Blood Collector and chart.

4. Analyze purple sample at microscope. Unlock handgun ammo and injector recipes.

5. Exit to side cubicle. Grab Victor's Journal, Empty Syringe, and blood sample.

6. Return to microscope. Analyze side cubicle sample. Unlock steroids and stabilizers.

7. Travel to waiting area storage room. Grab third blood sample.

8. Final return to microscope. Analyze storage room sample. Unlock medical syringe and Requiem ammo.

Key Item Locations Checklist

Lost track? Here is exactly where everything hides:

1. Monochrome Mr. Raccoon 2/25: East Reception counter.

2. Hemolytic Injector: Examination Room cabinet.

3. Blood Collector: Blood Research Lab main workbench.

4. Purple Blood Sample: Beside laser microscope in main lab.

5. Victor's Journal: Side cubicle near Blood Research Lab.

6. Empty Syringe: Same side cubicle.

7. Side Cubicle Blood Sample: Same side cubicle.

8. Storage Room Blood Sample: Waiting area storage room shelves.

9. Level 1 ID Wristband: Required prerequisite found earlier in story.

Combat Crafting Guide: What Each Recipe Does

Now that you possess all six recipes, here is how to use them:

1. Handgun Ammo: Basic ranged ammunition. Craft constantly to avoid running dry.

2. Hemolytic Injector: Silent assassination from behind. Also permanently kills downed zombies to prevent resurrection. Saves bullets.

3. Steroids: Temporarily boosts physical capabilities. High material cost. Craft only for difficult encounters.

4. Stabilizer: Reduces weapon sway and improves accuracy. Essential for precision shooting sections.

5. Medical Syringe: Fast healing item. Quicker than herbs but requires blood samples.

6. Requiem Ammo (12.7x55mm): Heavy caliber rounds for special weapons. Devastating against bosses and armored targets. Extremely rare materials required.

Infected blood on your map never disappears. Collect gradually during normal exploration. Save your Empty Syringes for when you truly need steroids or stabilizers. That completes every single secret hidden in the Blood Research Lab. You now possess the full crafting arsenal for the remainder of Resident Evil 9.