The greatest obstacle to the Hazardous Environment Combat Unit was a Black Mesa research associate named Gordon Freeman.

对HECU最大障碍就是黑山研究所一个叫戈登弗里曼的研究员。

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When the HECU arrived at Black Mesa they swiftly established control over the surface areas and the Black Mesa Central Command Complex.

当HECU到达黑山基地后，他们迅速控制了表面地区，并建立了中央指挥中心。

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Although the presence of Xen creatures in Black Mesa began to decline, a new group of creatures known as 'Race X' commenced their own invasion of the facility.

虽然当前在黑山研究所的XEN生物开始减少，可是一群新的被称为“X族”的生物开始他们自己的入侵。

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And just to underline how cool it is, Valve green lit Black Mesa, a remake of one of its own games (Half-Life).

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