This is a sneaky little glitch that will make the Gatling gun appear but without the red monk operating it. To do this go through the game normally and allow the red monk to escape. Return to the turret room and the monk will be operating the gattling gun, immediately leave the turret room and go to the main hall with the merchant and 'Save' the game. Re-load the game and enter the turret and chase the red monk until he returns to the turret room. When you now return to the turret room the turret will be raised and the red monk will be outside of the turret ring and without the turret on his side he can be defeated easily.

Opening Locks:
Save ammunition by using your knife to cut locks and open doors.

Avoid Damage from Traps:
When you see a trap (bear traps and explosives) avoid them by keeping your distance and shooting them in the middle using your laser sight.


Unlock Bonus Characters in Mercenaries Mini-Game
Get a 4 star rank in the following areas to unlock the corresponding character.

Unlock Albert Wesker:
Get a 4 Star rank in Waterworld.

Unlock Hunk:
Get a 4 Star rank in Island Commando Base.

Unlock Jack Krauser:
Get a 4 Star rank in Castle.

Unlock Ada Wong:
Get a 4 Star rank in Pueblo.

On Professional difficulty clear Leon's Story to unlock the PRL 412 weapon. It has two settings (stun and kill) which you activate by holding or tapping the fire button. It also has infinite ammunition.

Custom tune ALL the stats of each of the following weapons to their maximum to unlock the following effect.

TMP:
Increases firepower to 1.8

Blacktrail:
Increases firepower to 3.4

Red 9:
Increases firepower to 6.5

Riotgun:
Increases firepower to 10.0 and 8.0 at long range

Rifle:
Increases firepower to 30.0

Matilda:
Magazine capacity increases to 100.

Striker:
Magazine capacity increases to 100. shotgun:
Effective damage range of the gun increases.

Handgun:
Critacal head shot probability increases 5 times.

Punisher:
Bullets are able to penetrate up to 5 bodies.

Semi-Automatic Rifle:
Decreases firing speed to 0.42 seconds.

Broken Butterfly:
Increases damage to 50.0

Minethrower:
Homing ability added to mines

Killer7- No change

Character Unlockables

Unlock Ada Wong:
In game type A score 4000 or more points or alternately hit all of the targets on game type A.

Unlock Bella Sisters:
On game type B score 4000 or more points or alternately hit all of the targets on game type B.

Unlock Don Pedro:
In game type C Score 4000 or more points or alternately hit all of the targets on game type C.

Unlock J.J.:
In game type D score 4000 or more points or Hit all the targest in game D except Ashley. Unlock Ashley Graham:
In game type A score 3000 or more points.

Unlock Leon with Rocket Launcher:
In game type A Score 3000 or more points.

Unlock Leon with Shotgun:
In game type A score 3000 or more points.

Unlock Leon with Handgun:
In game type A score 3000 or more points. Unlock Luis Sera:
In game type A score 3000 or more points.

Unlock Don Diego:
In game type B score 3000 or more points.

Unlock Don Esteban:
In game type B score 3000 or more points.

Unlock Don Jose:
In game type B score 3000 or more points.

Unlock Don Manuel:
In game type B score 3000 or more points.

Unlock Dr. Salvador:
In game type B score 3000 or more points.

Unlock Zealot with Bowgun, Zealot with Scythe, Zealot with Shield:
In game type C score 3000 or more points

Unlock Leader Zealot:
In game type C score 3000 or more points.

Unlock Merchant:
In game type C score 3000 or more points. Unlock Isabel:
In game type D score 3000 or more points.

Unlock Maria:
In game type D score 3000 or more points.

Unlock Soldier with Dynamite, Soldier with Hammer, Soldier with Stun-rod:
In game type D score 3000 or more points.


Various Unlockables

Unlock Special Clothes for Ada, Leon and Ashley:
Beat the main game. Unlock Alternate Title Screen:
Complete the main game once.

Unlock Seperate Ways (Ada's Bonus Game):
Beat the main game once. Unlock Ashley's Knight Armor Outfit:
Beat Seperate Ways.

Unlock Leon's Gangster Outfit:
Beat Seperate Ways. Unlock Chicago Typewriter (Main Game):
Beat Seperate Ways.

Unlock Chicago Typewriter (Seperate Ways):
Beat Assignment Ada.

Unlock Handcannon:
Have each mercenary get a five star rating on all of the stages.

Unlock Professional Difficulty Setting:
Beat the main game once.

Unlock Plagas Laser Cannon:
Beat the game on Professional difficulty setting.

Unlock P.R.L 412:
Beat Professional difficulty setting

Unlock Infinite Rocket Launcher:
Beat the game once. Unlock Matilda:
Beat the game once.

Unlock Mercenaries:
Beat the main game once.

Unlock Movie Browser:
Beat the game


Mercenaries Mode unlockables

Unlock Ada:
Beat the Pueblo level with a 4 Star rank

Unlock Albert Wesker:
Beat the Waterworld with a 4 Star rank

Unlock Jack Krauser:
Beat the Castle with a 4 Star rank

Unlock Hunk:
Beat the Commando Base with a 4 Star rank

Unlock Handcannon:
Get 5 Star rankings on All levels with All the characters