Installation requires a decent amount of temporary disk space for decompression.
This sounds like you're looking for a review of a specific repack of from the site Kuyhaa. Since repacks are essentially compressed versions of games typically used in the "extra-official" scene, a review usually focuses on how well the installation works and if the game is actually "full." Review: Hard West 2 (Full Repack by Kuyhaa)
If you're looking for a reliable way to play Hard West 2 without the massive initial download, the Kuyhaa repack is a solid, stable choice. It delivers exactly what it promises: the full supernatural cowboy experience without the bloat.