Half-Life 2

Half-Life 2, released in 2004, stands as a monumental achievement in FPS design, frequently cited as one of the greatest video games ever made. Its groundbreaking physics engine allowed for unprecedented environmental interaction and puzzle-solving, a feature that significantly broadened the scope of what an FPS could be. The game achieved a Metacritic score of 96 out of 100, outperforming nearly every title released in its wake for critical acclaim. The average playtime often extends beyond 15 hours, offering a substantial single-player campaign.