This specific filename pattern is common for game installers or community-made content split into smaller segments for easier downloading. Based on official information, is a comprehensive bundle that includes the base game and all its DLC, such as:
Are you having trouble this specific part, or are you trying to find the original post where it was shared? Buy Alien: Isolation - The Collection - Xbox Alien.Isolation.Collection.part3.rar
: Right-click the first part (usually .part1.rar ) and select "Extract Here." The extraction program will automatically pull data from all subsequent parts to recreate the full file. This specific filename pattern is common for game