"Blake Stone is a first-person shooter computer game series created by JAM Productions and published by Apogee Software. It uses the Wolfenstein 3D game engine to render graphics in first person, while adding many features.
The shareware version of the first game Blake Stone: Aliens of Gold was released December 3, 1993. In 1994, a sequel called Blake Stone: Planet Strike was released, which continues where Aliens of Gold leaves off."
Source: Wikipedia, "Blake_Stone", available under the CC-BY-SA License.