If you want to download the game from elsewhere and want to make sure it's legit, here are the hashes of the installer downloaded from the archived official site (it comes in a zip file) provided by VirusTotal ( https://www.virustotal.com/gui/file/2cd21e9de58cf4584642e13fe7650db57c57378f819de98e30945c82480b3c66/details ):
MD5 - d2368241b877d01d812fd7cd76942c28
SHA-1 - e77b0d1b1a3232497fed7afda1c870d7f2d78e89
SHA-256 - 2cd21e9de58cf4584642e13fe7650db57c57378f819de98e30945c82480b3c66