Zombie Panic! Source is a cooperative, survival-horror Half-Life 2's first-person-shooter modification! Set in the middle of a zombie apocalypse, players start as a small group of survivors attempting to stay alive. Each map will have its own objectives to complete and win the round or survive by a period of time.
Here is a preview of the new Zombie Panic: Source barricading system in action. (Note: New system presents a HUD display in game for angle and size of wood boards which is not shown in the video but screenshots have been provided in the images section.)