Half-Life
Opposing Force Co-op

Opposing Force Co-op Opposing Force Coop Addon - Nuclear Winter

This mappack "Nuclear Winter" is an Opposing Force mod by Mr. White, which story takes place at North America year 2017 A.D. 8-9 players can...

 

Opposing Force Co-op Half-Life: Opposing Force Coop (v2.0)

"Half-Life: Opposing Force Coop" allows you to experience the epic Opposing Force story and environment with your friends, or with players a...

 

Opposing Force Co-op Opposing Force Coop Addon - Bootleg Squadrog

The author of this mappack "Brendon Chung" was disappointed with the lack of teamwork in the Opposing Force single-player mode, and develope...