Half-Life

"Half-Life is a science fiction first-person shooter video game developed by Valve Software and the company's debut product. First released by Sierra Studios on November 19, 1998, the game was also released for the PlayStation 2 on November 14, 2001. In Half-Life, players assume the role of Dr. Gordon Freeman, a recent graduate theoretical physicist who must fight his way out of a secret underground research facility, whose research and experiments into teleportation technology have gone wrong."

Source: Wikipedia, "Half-Life_(video_game)," available under the CC-BY-SA License.