Half-Life: Operation Rift

After completing Operation Rosenberg, Corporal Timothy Collins returns to headquarters and receives a new assignment immediately. A nuclear explosion at Black Mesa opened a dimensional rift in a nearby town, and the alien invasion that poured through is spreading. Collins is sent to exterminate the creatures and find a way to seal the rift before it expands further. Half-Life: Operation Rift is the second chapter in Corporal Collins' story—a fan-made campaign set in the aftermath of Black Mesa's final catastrophe.