Plot
You play as a tough as nails HECU grunt Jane Doe she makes her way through Black Mesa just after the accident involving the resonance cascade.
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Half-Life: Sum
Half-Life: Sum takes place during and after the resonance cascade in which you play as the tough as nails HECU grunt Jane Doe as she has to wade through 11 sprawling maps. A remake of the previous released mods "HTC", "Autonomy Lost" and "Abeyance".