Best-selling first-person-shooter videogame for PC

Best-selling first-person-shooter videogame for PC
Who
Half-Life
What
8000000 unit(s) sold
Where
Not Applicable
When
1998
Half-Life has sold over 8 million copies since its release in 1998, making it the best-selling first-person shooter on the PC. Together with sequels and spin-offs, the franchise has sold over 16 million copies, and its narrative-inspired design has influenced subsequent generations of shooters ever since. GWR Video Gamer's Edition 2008, title: Best-selling first-person shooter of all time.