A half Life1 Opposing Force mod. You're Corporal Shepard. A Soldier which arrives at Black Mesa in an alternate reality. Another Experiment went wrong and your mission: To find out what happened in Black Mesa and rescue the trapped personnel in it.
No features were found matching the criteria specified. We suggest you try the feature list with no filter applied, to browse all available. Post feature and help us achieve our mission of showcasing the best content from all developers. Join now to share your own content, we welcome creators and consumers alike and look forward to your comments.