Play the world's number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role affects your team's success. Your team's success affects your role.
This pack does not just include maps that I have had archived on my hard drive from the past 20 years. I also ported some maps to Opposing Force. Read documentation for more info. I have made a Windows version of this. The Windows version has utilities for modding Half-Life.