Resident Evil 9 Wiki: Puzzle Solutions, Weapon Locations, Boss Strategies & Achievements
Master RE9 with our comprehensive wiki guide. Find puzzle solutions, weapon locations, boss strategies, and achievement tips. Updated for 2025.
**Key Takeaways**
The Clocktower puzzle requires aligning three gears to 6:42 – any other combo triggers a Licker ambush.
The AE-9 prototype sniper rifle is hidden in the Chapel basement, behind a breakable wall (use a shotgun or explosive).
The final boss, The Hive Mind, has a weak point on its exposed neural cluster – hit it with fire weapons for 3x damage.
There are 42 achievements total, including 5 missable ones tied to optional dialogues and item pickups in Chapter 4.
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**Gear A**: On a dead researcher in the east corridor.
**Gear B**: Inside a locked cabinet (key is in the office safe, code 1947).
**Gear C**: Behind a painting in the west wing (shoot the frame).
**Solution**: Insert gears into the three slots. Set the small hand to 6 and the large hand to 42. Any other combination spawns a Licker wave.
### The Chemical Mixer (Chapter 5)
You need to create a yellow antidote. Follow this order:
1. Add Red herb to base solution.
2. Add Blue herb – turns purple.
3. Add Green herb – turns yellow. Done.
Mixing incorrectly (e.g., Green before Blue) gives you a poison that damages you on use.
### The Library Book Puzzle (Chapter 7)
Arrange the four books by publication year:
Left: 1842 (The Anatomy of Evil)
Left-center: 1905 (The House of Usher)
Right-center: 1931 (The Lost World)
Right: 1968 (The Parasite’s Lament)
This unlocks the hidden study containing the Cold Shot attachment for the M93R pistol.
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Weapon Locations
| Weapon | Location | Notes |
|--------|----------|-------|
| M93R Pistol | Chapter 1, police station locker (code 0451) | Standard sidearm, solid for headshots |
| AE-9 Sniper Rifle | Chapter 2, Chapel basement (breakable wall) | Best for long-range, holds 5 rounds |
| Riot Shotgun | Chapter 4, garage floor after car crash | Wide spread, good for crowds |
| Lightning Hawk Magnum | Chapter 6, boss arena after defeating the Tyrant-lite | High damage, rare ammo |
| Grenade Launcher | Chapter 8, locked armory (key in morgue drawer #7) | Use fire rounds on Hive Mind |
| Infected Rifle | Chapter 10, dropped by special enemy “The Warden” | 7.62mm rounds, slower but powerful |
**Pro tip**: The AE-9 sniper rifle is missable. If you leave the Chapel before breaking the wall, it becomes inaccessible. Save before entering.
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Weak point: Neural cluster in the center of its chest.
Use fire-based weapons (grenade launcher with fire rounds or flame thrower) – deals 3x damage.
Avoid the tentacle sweeps by staying at medium range. If you get grabbed, mash the left stick to break free.
**Tip**: Equip the Lightning Hawk with upgraded damage. Two magnum shots to the cluster stuns it for 5 seconds.
**Phase 2**:
The floor collapses. You’re on a narrow platform.
The Hive Mind now attacks with a toxic gas cloud. Equip the gas mask (found in Chapter 9) to reduce damage by 50%.
Shoot the glowing nodules on its legs to slow it down. Each leg takes 3 shotgun blasts.
Final blow: When it roars, throw a flashbang, then unload all fire rounds into the cluster.
### The Tyrant-lite (Chapter 6, optional boss)
Found in the sewers. You can avoid it by not collecting the red gem, but if you want the achievement “Gem Hunter,” you must fight it.
**Strategy**:
Use the Riot Shotgun at close range (under 5 meters). Aim for the head – 4 shots to stagger.
When it charges, dodge sideways (not backward).
Loot the keycard it drops to access the weapon upgrade station.
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**“Speed Demon”** – Complete the game in under 3 hours on Normal difficulty. Use the AE-9 sniper rifle to one-shot most enemies.
**“Conservationist”** – Complete the game without using a healing item. This is easier on Assisted mode, but you must avoid damage from traps and poison.
**“True Survivor”** – Complete on Professional difficulty. Enemies have 2x health and ammo is scarce. Prioritize the Riot Shotgun and Grenade Launcher.
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