Half-Life: Opposing Force Classic is a mod for Half-Life: Opposing Force, created by Apex Modding.
This is just like Half-Life Classic. This will bring back the old experience from the WON days. Until EVERYTHING got removed in 22.214.171.124 & 126.96.36.199 (current version)
To install extract into game’s folder.
Report problems with download to firstname.lastname@example.org