You're looking for a guide related to "Half-Life: Alyx v1.54.part03.rar". This seems to be a part of a game archive, specifically a RAR file, which is a type of compressed archive.
is a virtual reality game developed and published by Valve Corporation. It was released on March 23, 2020, for PC-based virtual reality headsets. Half.Life.Alyx.v1.54.part03.rar