Quite possibly the best PC game ever made
If you would have played Half Life as soon as it came out, chances were your computer werent able to handle them. The graphics were killer, the sound was excellent, and the gameplay was an aging entertainment without a death.
The gameplay is incredible. First of all, they are all sorts of enemies you face, along with a huge arsenal of weapons, and AI with intelligence that went ahead of all other games by like 3 years. This game will never tire you but at times will get you stuck as you try to find a way past a door or try to defeat a monster with no weak points, and situations like that. But, otherwise, it is amazing.
The graphics then were revolutionary, and even now are pretty solid. So the graphics are pixelised, it's stil amazing. Almost nothing in the game has little detail.
The sound was good. The sound effects created from the sound of the guns to the noises the creatures make are great. But they did not have enough music in the game to create a little atmosphere. You have to have music in a first person shooter.
The game is really cheap now and does deserve a demo from every gamer. If you care enough to own a PC, you owe it to yourself to play Half Life.