Half-Life is still one of the greatest FPS games that ever existed. Out of a list of the top 100 games, 99% of people would list Half-Life in the top 5. Looking back, this was an industry influencing game and due to its success, Valve became a household name. What made this game so popular back in the 1990s? What was it about Half-Life that was so different from other PC games at the time?