Half-Life

The Good
This is one of the most amazing games that can get you so engrossed into it, that you forget its a game. The engine and gameplay was so unique for 1998. The way you could interact with other characters and witness cool events in realtime made it feel like a movie. The graphics were really good to back up the gameplay, you could hardly tell it was made from the Quake 2 engine. Valve really modified the engine and made it good. The movements and characteristics of the enemies were really cool. The sound and lightning of the game made it downright scary. Even more incredible was the online multi player and the ease of custom and mods which lead to another classic..Counter-Strike!

The Bad
It's a pretty hard game, especially in the latter levels when the army comes after you. Apart from that, the AI for the NPC characters is a little weak sometimes but still pretty good considering when the game was made.

The Bottom Line
If you love FPS games or Horror or just PC games in general, you must play this once and see what made it so special. Once you see the intro, which is one of the best of all time, you will get hooked.