In order to download the beta patch, PC gamers will have to follow this guide:

• From your Steam ‘LIBRARY’ list, right-click on Resident Evil 4 / Biohazard 4 and select ‘Properties’
• Select the ‘BETAS’ tab.
• Type RE4BETAoptin105 (case-sensitive) in the ‘Enter beta access code’ field and then click CHECK CODE.
• Now, select “beta-public – 1.0.5” from the pull-down menu and click CLOSE.
• Wait for the Steam client to finish downloading the patch.
• Launch Resident Evil 4 / Biohazard 4 and verify that 1.0.5 is visible on the bottom right section of the ‘Press any key’ title screen.

Here is the complete changelog of Resident Evil 4 Beta Patch V.1.0.5:

Fixes & Tweaks:

• Specular highlight and bump mapping effect that was missing on the Xbox 360 version is now implemented in the Steam version
• Implemented new stereo/positional audio for in-game sound effects
• Your right hand comes off?
• Fixed handgun aim jumping to the right for Modern K&M setting
• Improved flares and yellow glow for torches, lamps, etc.
• Fixed the spotlight passing through the wall during the jet-ski sequence
• Disabled warm color filter after the “church puzzle”
• Fixed mouse sensitivity during Del Lago charge
• Fixed QTE difficulty for breaking enemies’ grip while using mouse

New Feature:

• Added vibrations to machine guns in Separate Ways/Another Order, Assignment Ada and Mercenaries.