Half-Life 2

When it comes to Valve's Sci-fi classic we would never dare to miss it. Half-Life 2 introduced one of the unique game engines of all time which had surpassed its previous predecessor in all ways. Released almost 10 years ago, Half-life 2 is a good looking achievement for a 3D title that had gone straight for realism. With a great physics system, which was used for object destruction with some creative puzzles. The main thing about this game was people would be engrossed in it completely which had made it one of the top pc games in the world.