This is a mod made by a Korean mapper. The read me is almost empty. It seems to be a remake of Half-Life! It starts with a tram ride, followed by collecting your hazard suit, then pushing the material into the test chamber and watch things go wrong.
Bad pacing near the end. The parking lot/tunnel part was very tedious and I did not know what to do to advance. Also too many enemies scattered to make things difficult. If played wrong you can be stuck with no health. Play this on Normal-Easy or else you will not have a enjoyable time.