PSR is a group of Source Engine developers, currently focusing on Black Mesa: Hazard Course, an addon for the Half-Life reimagining Black Mesa.

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Black Mesa: Hazard Course v1.0.0 (Mod ZIP)

Black Mesa: Hazard Course v1.0.0 (Mod ZIP)

Black Mesa: Hazard Course Full Version 18 comments

Download Black Mesa: Hazard Course, an addon for Black Mesa centered around a completely new take on Half-Life's training level, Hazard Course, featuring...

Black Mesa: Hazard Course v1.0.0 (Mod Installer)

Black Mesa: Hazard Course v1.0.0 (Mod Installer)

Black Mesa: Hazard Course Full Version 20 comments

Download Black Mesa: Hazard Course, an addon for Black Mesa centered around a completely new take on Half-Life's training level, Hazard Course, featuring...

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