Knife - Combat Knife for close quarters fighting, something you might want to avoid to stay alive here or try for a challenge.
Beretta - Jill starts the game with this weapon. Chris will find Jill's Beretta in the 'Main Hall' of the mansion on the 1st floor. Holds 15 bullets in one clip.
Shotgun - The shotgun is powerful, and comes in handy. It holds 7 shells fully loaded.
Bazooka - After you find Forest Speyer's body you can obtain his Bazooka, and use it for yourself. A powerful weapon with 3 choices of ammo: Acid Rounds | Grenade Rounds | Flame Rounds
Colt Python - .357 Magnum, it holds 6 magnum rounds fully loaded.
Flamethrower - Uses % based ammo.
Rocket Launcher - This is the most powerful weapon in the game. You get it at the end fighting the tyrant or if you beat the game with A or B ranking, it can kill almost any enemy in one shot.