Half-Life 2 consists of three "sagas" i'd say:
The base game "Half-Life 2", "Half-Life Episode 1" and "Half-Life Episode 2" (and you should play them in this order)
Starting with the Half-Life 2, this is probably the best game I have ever played. It is unlike any game I have played up until this point: Even though the game is over 20 years old by now, I have seldomly seen a game looking this good. There is no raytracing or modern technology in play here, but the artistic composition of the textures, character models etc. makes this game look more realistic than most titles released today, which try to appeal to fans of hyperrealistic graphics.
IMO, this IS the game which replicates irl surroundings the best.
One main point critics mention when comparing HL2 to its predecessor is the "lacking" and "worsened" gunplay. I would say otherwise: The gunplay is a perfect blend between science-fiction and real-life weaponry. Your arsenal is decimated to the core weapons needed; while you may not have the ability to throw alien insects at soldiers anymore or your spammable RPG like in HL1, you are able to experience rifles and high-tech devices which are packed with superb and satisfying sound and visual design. Furthermore, you as the player are forced to use your arsenal properly in specific situations and levels (e.g. Ravenholm), creating challenging gameplay which would not have been possible to replicate in the first installment.
The story and plot progression is of astounding quality: The devs of this game managed to create an experience which improves upon the visual storytelling of the first game. There is never a cutscene which feels out of place or too long; they are always placed in sessions where players can catch a break between levels. With this feature, a "harmonic" gameplay formula is created in which the game is always in a flow state, guaranteeing that you will get immersed into the this game. Many action games of today just miss this and feel utterly bothersome to play.
Voice-Acting is of astounding quality. Its THE perfect game.
I would like to say the same for Episode 1, but this is just not possible. IMO, I've felt quite bored playing this one: The game strips away most of your weapons, creating situations in the middle portion of the story where you are left without any ammo. It just feels like a free DLC with a lot of reused assets. I expected more after playing the best game ever made -
Episode 2 on the other hand feels like a genuine expansion of the story. From the get-go you are able to recognize a slight shift in the artstyle - away from the grey-yellowish tones of a destroyed City 17 into the woods, where blue and green synergize into a more natural atmosphere. New enemies are to be found, features are expanded upon. While I did not find this Episode to be as good as the base game, it still made for an amazing and much better expansion than EP1.
After finishing this game, I am able to understand all the Valve fans waiting for HL3 and their eagerness to be able to progress further into the story. We all want to see how the Portal games correlate with the HL games. Bring about HL3, Valve ...
