Half-Life 2

Half-Life 2 (stylized as HλLF-LIFE2) is a first-person shooter video game and the sequel to Half-Life. Developed and published by Valve, it was released on November 16, 2004, following a protracted five-year $40 million development, during which a substantial part of the project was leaked and distributed on the Internet.

This game is separated into short-length chapters, including Episode One and Two.

Plot
The game takes place some years after the events of Half-Life, where the protagonist, Gordon Freeman, is awakened by the enigmatic G-Man to find out that the world has been taken over by the alien Combine due to events that occurred at the Black Mesa Research Facility, the setting of the first game.

Gordon encounters human resistance forces that aid him, including former associates from Black Mesa, among them Dr. Eli Vance and his daughter Alyx, the latter whom joins Gordon as they search for a way to eliminate the Combine from Earth and free humanity.

Overall

 * 1) The game has revolutionized graphics and physics due to being made in the Source engine, which was capable of more emotion in characters and beautiful environments that look lifelike. These graphics still are great to this day (minus with some textures that was somewhat low quality by today standards when looking closer).
 * 2) Great puzzles that are all physics based, which makes sense since Freeman is a physicist. It also stands out from other FPS games that use them because most of them are just "go there and press button or destroy something with this to progress", here in this game most of these puzzles actually feel like physics or environment interaction is involved.
 * 3) Amazing soundtrack by Kelly Bailey.
 * 4) Instead of the same copy-paste scientists and security guards that Half-Life 1 had, there are more types of NPCs and even new characters who are extremely likable.
 * 5) More backstory about the protagonist, Gordon Freeman.
 * 6) Because the game is more focused on story, there are actual characters in the game. This includes Isaac and Eli who were both scientist that worked at Black Mesa and were there during the events of the first game.
 * 7) Rather than taking place in a western setting, such as the U.S., or confined in a large facility, the game takes place in Eastern Europe, which is a really nice and interesting idea. The area also has references from many Eastern-Europe countries, via signs that are written in different languages besides English (such as Russian, Romanian, etc.), and that there are also more areas to explore within that world such as a drained coast, zombie infested town, prison or an alien fortress.
 * 8) Brilliant plot and story with influences from the novel Nineteen Eighty-Four. Gordon is brought back into the world by the G-Man and finds Earth to be taken over by an alien race, and Gordon must help the Resistance take back Earth.
 * 9) The Gravity Gun allows for more creative combat, such as throwing an explosive barrel at a group of zombies, and it also creates clever physics puzzles in some cases, which is another thing the game excels at.
 * 10) The difficulty has been toned down meaning the player won't have to deal with death traps and won't die as easily.
 * 11) Great voice acting that feels genuine especially for a game from 2004.
 * 12) Allies are much better this time. Their AI is much better (they strafe/use cover, verbally recognize different enemy types (i.e. "Combine!" "Zombies!"), and are smart enough to back away from melee enemies while firing), they have stronger weapons like SMGs, and are bulletproof to the players' guns so you don't accidentally kill them.
 * 13) The gunplay and overall combat is an improvement that allows the player to defeat enemies in a more creative way and the toned down difficulty allows for more intense combat sequences.
 * 14) It introduces vehicles that allow you to traverse large levels, which spice up the gameplay a little.
 * 15) Great modifications, including some of them that improve the graphics such as Half-Life 2: Update, which is made by one person who is involved in the development of Half-Life 2 (available on Steam).

Episode One

 * 1) A new enemy, a.k.a. the Zombine, is introduced in the game. It is a Combine soldier which is controlled by a headcrab, which can hold a grenade until it blows up.
 * 2) Isaac Kleiner's speech is interesting. Take a listen.
 * 3) Some unused ideas from the development of Half-Life 2 have been reused seen here for the Episode's plot. Especially, the jaw bone from the Basic Zombie's model as seen from the the leak, being reused for the Zombine.

Episode Two

 * 1) A new vehicle is introduced, the salvaged 1969 Dodge Charger muscle car.
 * 2) The Flashlight has its own bar instead of being attached to the sprint meter.
 * 3) There is a lot of variety. You can explore a mine, walk among a broken bridge, drive the muscle car, defend yourself of the incoming antlions and Combine, and more.
 * 4) Three (four if you count the grub) new enemy NPCs are introduced. The Hunter, which is a miniature Strider that shoots flechettes, The Antlion Worker, which is a poisonous Antlion, another variation of the Antlion Guard and the grub, which can be stepped on to earn some healing pellets.
 * 5) Two new characters make their debut as well. Arne Magnusson, a scientist who invented the Magnusson Device and Uriah, a vortigaunt scientist.
 * 6) Striders are much easy to kill. Rather than having to waste 5-7 rockets there's the new Magnusson Device - This sticky grenade can be launched by the Gravity Gun and explodes when shot, shredding the Strider with no effort.
 * 7) Some more unused ideas and mechanics from the original Half-Life 2 seen here, have been even more reused or reworked for this episode's plot. These include the Combine Guard's running AI being converted into the Hunter's running AI, and the first quarter of the game supposedly taking place in-between Eli's Cave to the Wasteland chapters in the beta version, is re-purposed in an abandoned mine in the retail.
 * 8) The game is longer than its prequel, being two thirds the length of Half-Life 2.

Overall

 * 1) The amount of weapons is more limited than in the prequel. Also, they seem less creative with there being no alien weapons (excluding the Bugbait) at all.
 * 2) *On the subject of the Bugbait, since it's an alien organic weapon, it unintentionally creates a gameplay plothole, which in the final version has the weapon creating infinite spheres while somehow not showing where new balls are grown (like being grown on Gordon's suit or where it came from); despite showing it in the leak, a concept art, and E3 trailer with the same name (which in the latter shows five/six of them are all equipped to try 'addressing'/fixing the plothole, rather than one of them and seeing it removed in the final version), that the Bugbait originally had limited ammunition (from one infinite amount to 5/10 balls).
 * 3) *There were planned to be even less weapons in some earlier versions of the game, funnily enough!
 * 4) There is a notable lack of enemies from Half-Life or even new ones not found in retail, with a handful more planned to be included initially, such as the Bullsquid and Houndeye.
 * 5) For old players, the game might be a bit short due to various maps being cut from the game.
 * 6) Resistance NPCs can be annoying in the next two chapters for if not all hardcore players who want to kill the Combine alone, in the final chapters in the game.
 * 7) The original Xbox version has a couple of issues when played on the 360. It does not play on PAL-60 televisions with composite cabling (this doesn't affect PAL-50 televisions) and screen corruption in attract mode will occur after the console has been idle for a long period of time.
 * 8) The Steampipe (Source Engine 2013) release of Half-Life 2 requires newer components in one's computer, and a more capable GPU.
 * 9) Some of the music tracks are recycled from the prequel, such as the "Lambda Core"/"Diabolical Adrenaline Guitar" during the Hunter-Chopper chase in Water Hazard chapter.
 * 10) This game retconned lots of things from Half-Life as you'll hear characters talk about things that weren't originally true or didn't happen in the previous game, which could confuse some players of the first game.
 * 11) Allies have an annoying tendency to charge straight into sniper rifle fire, cluster around each other and the player instead of giving anybody some space to breathe (or run away from a tossed grenade), and cannot be told to "wait" in a safe position for more than several seconds before rushing in to crowd around the player again.

Episode Two

 * 1) The ending was left on a huge cliffhanger for a course of 13 long years until HL: Alyx release. Originally, Half-Life 2: Episode Three (and later on, Half-Life 3) was going to be made but was cancelled or put on indefinite hold due to a multitude of issues: scope-creep, developmental issues with both the Source Engine and the Source 2 engine, a lack of satisfying ideas, and the fact that they constantly wrote themselves in a corner since every script made led back to the Citadel. Fortunately, the ending of Half-Life: Alyx implied that Half-Life 2: Episode Three/Half-Life 3 is going to happen and the cliffhanger will be resolved.
 * 2) The PlayStation 3 version is underwhelming as Valve (at the time) didn't have that much faith in the PS3, aswell PS3 development are very complex (due to Cell architecture) at the time and outsourced it to EA instead.
 * 3) One of the new enemies is just a lazy reskin (specifically the Antlion Guardian, since its only difference is another skin to tell it apart from normal Guards) that is toxic green skin, a effective radioactive-like push, and an okay in-universe backstory within the gameplay to justify their existence.
 * 4) Metrocops don't appear in this game, yet the game never tells you why but it's guess they were very likely wiped out by the time of Episode 2's beginning.
 * 5) *Even Combine Soldiers were completely absent from the final battle despite them being seen protecting an Advisor pod from another Antlion cave entrance. Thus it's a guess that this was a cut idea from the last minute before the game was released.

Reception
Half-Life 2 was met with universal critical acclaim upon release, and with an aggregate score of 96/100 on Metacritic, remains tied with the first Half-Life game and Grand Theft Auto V for the best-reviewed PC game of all time. Sources such as GameSpy, The Cincinnati Enquirer, The New York Times, and VideoGamer.com gave it perfect scores, and others, such as PC Gamer, IGN, GamesRadar, and Eurogamer, gave near-perfect scores, while the game became the fifth title to receive Edge magazine's ten-out-of-ten score. Critics who applauded the game cited the advanced graphics and physics. Maximum PC awarded Half-Life 2 11 on their rating scale which normally peaks at 10, calling it "the best game ever made".

In the United States, Half-Life 2's PC version sold 680,000 copies and had earned $34.3 million by August 2006. It was the country's 17th best-selling PC game between January 2000 and August 2006. It received a "Platinum" sales award from the Entertainment and Leisure Software Publishers Association (ELSPA), indicating sales of at least 300,000 copies in the United Kingdom. Forbes reported on February 9, 2011 that the game had sold 12 million copies worldwide

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