: The official Steam store page is the safest way to get the game. It is frequently on sale for a very low price.
If you want to play the game safely, I recommend using these official or highly-trusted sources: DOWNLOAD FILE – HALF-LIFE: OPPOSING FORCE.RAR
: Legitimate digital distributors (like Steam) or modding communities (like ModDB) do not package files with "DOWNLOAD FILE" in the title. : The official Steam store page is the
: Do not open this .rar file. If you have already downloaded it, delete it immediately and run a full system scan with a reputable antivirus like Malwarebytes or Windows Defender . DOWNLOAD FILE – HALF-LIFE: OPPOSING FORCE.RAR