The 50155016.EXE file you have requested: Official Patches / Half-Life: Initial Encounter Patch version 5.0.1. - 5.64mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
This is a retail edition that included Half-Life: Day One and a stand-alone version of Team Fortress Classic, version 22.214.171.124. This patch will update to 126.96.36.199.