Laboratory in Mountains mod for Half-Life

On June, 8th, 1947, in northern America, the group of the miners extracting coal in Appalachsky kameno-coal basin, has come across a surprising find. They had been found out pass to a rock, the leader in a small oasis in the extent no more than 8,5 kilometres, from different directions surrounded with mountains Appalachian mountains. In east part of an oasis the ancient pagan temple constructed about 20 thousand of years B.C. has been found out. The architecture of a temple, had no external signs of an accessory what or from known cultures. For detailed studying of a find, in an oasis Appalachian mountains, the group of scientists which have made one more surprising find has been directed. In the heart of a temple, behind an altar, in a wall closed by a huge boulder, have found out a power portal. The government of the USA has coded a find. In 1969 in an oasis Appalachian mountains the research complex which was engaged in studying of a temple has been constructed. In a portal radio-controlled robots, for gathering of every possible samples have been sent. But as soon as robots have disappeared in blue light of a portal, communication with them has been lost. As scientifically research group of volunteers has completely disappeared. The scientists working over the project, have noticed that people were in immediate proximity to a portal often were ill SRD (sharp respiratory disease). On studying were samples of a matter getting of a portal in our world are taken. Researches have shown that from that party of a power portal there is a life. The considerable quantity of microorganisms similar on a structure with the terrestrial has been found. It also explained frequent disease of the working personnel. The imunnaja system of the person, for thousand years got used to struggle with all terrestrial viruses and pathogenic bacteria, coped not at once with their new kinds.
On November, 21st, 2009, from laboratory Appalachian mountains the distress signal has been received. Then communication with a complex has been interrupted. By the government of the USA it has been solved will send in an oasis Appalachian mountains group of the special purpose supplied with equipment of chemical protection. Of group have set the task - to destroy a portal...