Silent Hunter 4: Wolves of the Pacific to version 1.5, you must have the U-Boat Missions

Step 3: Install v1.4 Update

Yes, you need this intermediate step. Download the official v1.4 patch from Subsim or The Archive. Install it.

Fall of the Rising Sun Ultimate (FotRSU)

Most modern "mega-mods" for Silent Hunter 4 strictly require version 1.5 and will not function on version 1.4. These include: Trigger Maru Overhauled (TMO) Real Fleet Boat (RFB) Installation & Modding Tips

Manual Patching for Older Disks

: If you have an original physical disk (v1.0 to v1.3), you must first use the free v1.4 patch available on community sites like The Patches Scrolls before the U-Boat Missions installer will work. Key Features of Version 1.5

If you have installed a fresh copy of Silent Hunter 4 (often version 1.0 or 1.2 out of the box for disc versions, or 1.3 for some digital downloads), upgrading to 1.5 is highly recommended for several reasons:

Method 1: The Ubisoft Official Patch (Standalone)

Without the 1.5 patch, you are stuck in 2007. With it, you can experience:

Patch 1.5 Overview

, you must purchase or install this specific add-on to reach version 1.5. Key Download & Installation Details The "Patch" is an Add-on