.rar (Roshal Archive), specifically part 2 of a multi-part compressed archive.
Because this file is part of a third-party archive ( .part2.rar ) rather than an official Steam update, please consider the following: Left.4.Dead.2.v2.2.2.6.part2.rar
This file likely contains data for v2.2.2.6 , which was a significant official update released by Valve on November 19, 2022 . .rar (Roshal Archive)