Here is an informative feature breakdown of what makes version 1.23 significant:

Based on that specific filename, you are likely looking at the first segment of a multi-part compressed archive for . This version is notable because it represents the final major update for the original DiRT Rally, bringing the game to its "Complete Edition" state.

: By this version, all DLC—including the iconic Pikes Peak International Hill Climb, the 1960s-2010s car classes, and the FIA World Rallycross tracks—is fully integrated into the base game files.

: Version 1.23 stabilized the VR experience, allowing players to look into corners and gauge elevations more naturally than a flat screen allows.

: This update refined the "Asynchronous SpaceWarp" compatibility, ensuring that even when frame rates dipped during heavy rain or snow effects, the head-tracking remained smooth to prevent motion sickness. Key Game Context