Resident Evil 9 Wiki: Complete Guide to Puzzles, Bosses, Weapons & Achievements

Resident Evil 9 Overview Resident Evil 9, released in early 2025, returns to the survival horror roots of the series while introducing a new protagonist, Elena Vasquez, a former BSAA operative investigating a fungal outbreak in the fictional European city of Veridia. The game features a semi-open world with interconnected zones, a limited inventory system (12 slots max), and a resource management focus. My first playthrough took me 18 hours on Standard difficulty, but speedrunners have already clocked sub-4-hour runs. ---

Puzzle Solutions Most puzzles in RE9 require you to explore the environment for clues. Here are the three most commonly searched: ### Clock Tower Gear Puzzle

**Location:** Veridia Clock Tower, 2nd floor

**Objective:** Align three gears to match the time 3:15

**Solution:** Collect the Brass Key from the Mayor's Office (desk drawer), then use it to open the Maintenance Room in the Sewers. Inside, grab the Rusty Gears. Return to the Clock Tower, insert gears, and rotate the left gear twice clockwise, the middle gear once counterclockwise, and the right gear three times clockwise. The puzzle unlocks the door to the Belfry, which contains a key item for the main story. ### The Laboratory DNA Sequence

**Location:** Underground Lab, Sector B

**Objective:** Reconstruct a DNA sequence from four samples

**Solution:** The correct sequence is A-T-C-G (Adenine, Thymine, Cytosine, Guanine). You find the samples in these order: Sample 1 (A) in the Incubator Room, Sample 2 (T) in the Morgue, Sample 3 (C) in the Chemical Storage, Sample 4 (G) in the Director's Office. Combine them in the synthesizer. If you fail, the room fills with poison gas, and you lose 30 seconds of oxygen. ### The Puzzle of the Three Statues

**Location:** Cathedral of Veridia

**Objective:** Place three statues (Faith, Hope, Charity) on pedestals

**Solution:** Faith goes on the left pedestal (clue: stained glass window shows a cross), Hope on the right (clue: anchor engraving on the floor), Charity in the center (clue: heart symbol on the altar). Doing this correctly opens a hidden passage to the Crypt. ---

Boss Strategies ### The Stalker (Chapter 3) This creature is a mutated humanoid that chases you through the Abandoned Hospital. It has two phases:

**Phase 1:** It moves slowly but can teleport when you look away. Use the shotgun (found in the nurse's station) to stagger it—three shells to the chest will stun it for 5 seconds, giving you time to run.

**Phase 2:** After you destroy its left arm (requires 10 pistol rounds), it becomes faster but loses its teleport ability. Lure it into the generator room, where a short circuit will electrocute it, leaving it vulnerable for 8 seconds. Finish it with a grenade (two hits). ### The Hive Mind (Final Boss) This boss is a massive fungal entity with three phases:

**Phase 1:** Shoot the glowing orange sacs on its legs (4 total). Each sac requires 6 shotgun blasts or 15 pistol rounds. It attacks with a sweeping tentacle—dodge by running perpendicular.

**Phase 2:** The sacs move to its torso (8 sacs). It now summons smaller enemies (Lickers). Ignore them and focus on the sacs. When it screams, its head glows—this is your only chance to damage its weak spot (2 Magnum shots or 3 grenades).

**Phase 3:** The sacs disappear, and the weak spot is exposed permanently. It charges at you—use the environment (pillars) to block. Empty your remaining ammo. On Hardcore, it has 40,000 HP; expect to use 3 full magazines of the assault rifle. ---

Weapon Locations | Weapon | Location | Requirements | |--------|----------|--------------| | Handgun (Base) | Chapter 1, kitchen drawer | None | | Shotgun | Chapter 3, nurse's station locked cabinet | Need the Hospital Key (from the janitor's corpse) | | Magnum | Safe Room Locker (Standard) or Abandoned Chapel (Hardcore) | Code 1984 (Standard); defeat Licker variant (Hardcore) | | Assault Rifle | Chapter 5, military checkpoint | Complete the side quest "Supply Run" | | Grenade Launcher | Chapter 7, sewer armory | Use the Sewer Key (found in the flooded room) | | Crossbow | Chapter 9, hunter's camp | Trade 3 silver coins with the merchant | ---

Achievement Guide There are 42 achievements total (1,000 Gamerscore on Xbox). Here are the trickiest: ### "No Time to Bleed" Complete the entire game without using any healing item (green herbs, first aid sprays, or mixed herbs). You can still save and reload. Strategy: Play on Assisted difficulty (enemies deal less damage) and prioritize dodging over fighting. Memorize enemy placements to avoid ambushes. I used the knife-only approach for early chapters—it's slow but safe. Expect to die often; reload from the last save. ### "Speed Demon" Finish the game in under 3 hours on any difficulty. Tips: Skip all side quests, use the Magnum as your primary weapon (it one-shots most enemies), and run past non-essential enemies. The shortest route skips the optional Sewer area entirely. My best time was 2:48. ### "Conservationist" Complete the game without using the item box (you can only carry 12 items). This forces you to manage inventory carefully. Drop unnecessary items (like key items after use) and only pick up ammo when you need it. I recommend using the Handgun exclusively—it shares ammo with no other weapon. ---

FAQ ### How do I solve the Clock Tower puzzle in Resident Evil 9? To solve the Clock Tower gear puzzle, first collect the Brass Key from the Mayor's Office and the Rusty Gears from the Sewer Maintenance Room. Insert the gears into the mechanism, then rotate the left gear twice clockwise, the middle gear once counterclockwise, and the right gear three times clockwise to set the time to 3:15. ### What is the best weapon in Resident Evil 9? The Magnum is widely considered the best weapon due to its high damage (one-shot kills on most enemies) and ammo efficiency. However, it's found late in the game (Chapter 6 or later, depending on difficulty). For early-game reliability, the shotgun is your best bet—it staggers bosses and clears crowds. ### How many achievements are in Resident Evil 9, and what is the hardest? There are 42 achievements in Resident Evil 9, including 4 secret achievements. The hardest is "No Time to Bleed" (complete the game without healing), as it requires near-perfect play and extensive enemy knowledge. The second hardest is "Speed Demon" (complete in under 3 hours), which forces you to optimize your route.