You're play a security guard be employed as Black Mesa Research Facility. In serving highly level research facility of the special one officer black security, they also called as secret security personnel, so your work need to going the safeguard through highly level scientists. You're familiar with the who knew name Eddy, but he try a hiding secret behavior, that you would be going next one justice sentencing in the depths of him, at the end must to stop his conspiracy.
You in the Black Mesa Research Facility Security Officer work,You in Black Mesa work have Ten years,You become Black Security Officer...
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Like the lightning in this... Add some black explosion and other damage sprites onto the walls.
maybe some dirt models or brushes on the ground. You could also simulate some parts of the ceiling which fell to the ground.