As Dr. Gordon Freeman, you were last seen exiting City 17 with Alyx Vance as the Citadel erupted amidst a storm of unknown proportions. In Episode Two, you must battle and race against Combine forces as you traverse the White Forest to deliver a crucial information packet stolen from the Citadel to an enclave of fellow resistance scientists.
Half-Life: Neutrophils is a short map, in which takes place in White Forest, deep in the underground facility. Your objective? Escape from it.
This has potential but unfortunately overstayed its welcome.