What is Half-Life?
Half-Life is a science fiction first-person shooter video game developed by Valve Software, the company's debut product and the first in the Half-Life series.
Half-Life received the expansion packs Half-Life: Opposing Force (1999) and Half-Life: Blue Shift (2001). The game was ported to the PlayStation 2 in 2001, along with another expansion Half-Life: Decay, as well as to macOS and Linux in 2013. A sequel, Half-Life 2, was released in 2004.