An ordinary person lives for himself and does not suspect that the world of darkness exists parallel to ours and the line that separates them in some places is so thin that it was decided by the High Council to establish sentries with a special gun there. The undead from the dark world periodically breaks into us, and the sentries are waiting for them. You will go to one of the posts in Lone Sentry and find yourself there just at the time of the breakthrough. The sentry has already uncovered the gun, and you have to shoot. You can not miss a single monster past yourself, it is very dangerous. Try to destroy the attackers on the way, not allowing close approach.