Named Game of the Year by over 50 publications, Valve's début title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
It's a nice game and it was made in the 1990s and thats why it's nice when you see the way the game was made. But HL2 was better but HL1 was the first game you know :D