Play Half-Life with friends! Players fight computer-controlled monsters through the original Half-Life storyline or hundreds of available co-operative scenarios. Also includes a plethora of new weapons, enemies, visuals and gameplay systems. Customization features allow each map to use its own unique weapons and enemies.
A teaser trailer for Sven Co-op 3.5 (the co-operative Half-Life modification), created by the SC Beta Test Team.