Half-Life 2 - Contingency 0.1.5

Author: Agent Red Productions

As a member of an elite rebel fighting force based out of City 17, you and your four comrades have found yourself in a most hopeless situation: an unstoppable horde is approaching, one that cannot be defeated even by the likes of you and your experienced team. Facing insurmountable odds and with no hope of rescue, there's only one thing you can do: hold your ground and face endless waves of enemies in a suicidal yet heroic effort to save as many future victims’ lives as possible. You will not survive.