The first Entropy: Zero was a fun but flawed experience. This sequel is so much polished and better paced. The level design is excellent, with interesting encounters and great art direction.
They've nailed the HL aesthetic. The HL lore is used in a very interesting way. All the creatures, items and locations seem to fit well in this universe. They've added a lot of creatures from Xen compared to the original HL2 which is fun.
Combats feel more punchy than the original game, and all the new weapon animations are great. There is also a new grenade with an interesting concept.
Puzzles are also interesting but not too difficult or repetitive/annoying to solve. (Not like the 50 cable puzzles in Black Mesa Xen for example).
The writing is also surprisingly good. At first it's a bit weird to have a talking protagonist in a HL experience, but the dialogue between 3650 and Wilson is fun and touching. 3650 seems like a standard asshole character at first, but we keep learning about his struggle and feelings towards the adventure. The voice acting is also pretty good, I was surprised that it was not actors but the developers themselves.
Took me around 7 hours to finish. It even has a great soundtrack and achievements. It's mind-blowing that it's free.

A nice reminder of how Half Life 2 has forever altered gaming and an extremely impressive mod made by a small team that manages to do a few things even better than Valve originally did. Ultimately, it's more of a tight game than a mod and it has some slight bumps detracting from a perfect score, but if you're a fan of HL2, there's no doubt this is a must-try.

You don't have to play the first to dive into the second, if you were worried. Though that is probably worth trying, too, there's no question the sequel is an upgrade. Its plot is similar to the alternate campaigns for Half Life, like Opposing Force, where you're another influential character doing his own business while other important things are happening simultaneously. In this case, Gordon Freeman is escaping City 17 and you're hunting Judith Mossman. It's more important to know what's happening in not just Half Life, but the Portal series to fully appreciate what's happening in Entropy: Zero 2. The plot is loaded with tie-ins and nods, though it's somewhat lacking in any depth the original series managed to establish, and is one of the weaker part of the experience.

Gunplay is basically ripped right from HL2, added in is the MP5, which has a tight-patterned burst fire that's very useful for distance kills and full auto for when you need to rock 'n' roll on a group. There's also a Xen grenade that sucks everything near it into a portal to the god-knows-where planet, and swaps them with some aliens in return. This grenade isn't too useful for fights, as you'd just be swapping enemies for more enemies, but rather has a few fun puzzles in the game where they're necessary.

In another nod to HL2:E2, there's a "companion" to bring along with you for most of the campaign. Unlike HL2:E2's Gnome Chomsky, here Wilson will actually speak to you pretty frequently and makes many contextual remarks. If you're reading this before playing the game, bring Wilson with you the whole way, it's worth it. It's by far the better experience and clearly intended. He's not as much of a burden as that Chomsky fella.

It's fun becoming Death and just wiping out rebels as 3650. You'll like having your fellow Combine alongside you as you do the obviously morally wrong thing. The beginning part with the Portal references is a bit of a drag, but once of you get the vehicle it's pretty solid from there out. Again, if you like Half Life 2, do yourself a favor and try this out. It's a good mix of nostalgia and with a now-speaking main character on his own Combine plotline, there's enough "new" to keep it fresh. Check out Entropy: Zero 2, it's free on Steam if you own HL2!

Genuinely incredible mod that masterfully expands upon Half-Life's story. It brings together so many elements from across the series like the connections to the Portal games with characters like Wilson and bringing back enemies from the original Half-Life and it's expansion Opposing Forces in such a way that you can tell this was made by people that truly loved the series. The story is also surprisingly deep and existentially and really goes into how desperate the people who join the Combine are. It's really commendable how Breadman and his team managed to make such an amazing sequel to a fairly barebones mod. Would highly recommend.

An awesome community made expansion for half life 2. The level design throughout the whole thing was consistently great, bad cop I thought was going to be goofy at first but he was actually a pretty enjoyable protagonist and had some funny lines and I also loved the story and its integration with that “other valve game” that’s done it a tasteful way that doesn’t make it seem like a cringe fan fiction.

The biggest issue I thought of while playing this was the voice acting for the rebel radio guy sucks lol

Easily one of the best Half-Life 2 mods out there. I pretty much went into this one blind as I wasn't really following it's development and only played the first one a few days before the release. I was pleasantly surprised by… pretty much everything.

The combat feels very nice, returning weapons feel fresh thanks to nice new animations and sounds, and the few new ones are fun to use. The squad system, while already present in the base Half-Life 2, is much improved here and fits very well with the Combine theme. The ability to kick stuff is also nice, it makes the game faster since you don't need to switch to the crowbar or something to break crates and stuff. It's also super cool that you can use it to disarm rebels and make them surrender. Enemy-wise I really enjoyed seeing some old ones return, and seeing more Xen stuff was super neat. Level design was also cool, especially enjoyed the sections where you have to hold up against waves of enemies.

Without spoiling too much, the story integrates really well into the Half-Life 2 storyline, I especially loved visiting location showed in the previous games.

Also the bonus maps are an okay addition, I enjoyed being able to replay combat encounters with different objectives, even if admittedly some more fun than others.

A fairly substantial upgrade from the original and a great game in it's own right. It's got a lot of fun new mechanics, well-justified fanservice, a good amount of variety, and just about everything you'd want in a half life game. It does feel a tad excessive in fanservice at times, but that's fine for a mod. Compared to the first, the game is much better at conveying information to the player. I got lost much less often, although there were a few instances of poorly telegraphed environments. If you like half-life, check this out for sure.

Imagine Hunt Down the Freeman, but actually good.
This is probably the besat HL2 mod out there, boasting it's great level design and variety, well written story, charismatic characters, and improvements to base HL2 formula, and all this while being as lore friendly as possible for such an ambitious project.
You play as Bad Cop/3650's clone afyer the events of EZ1 who is tasked by the Combine to search and capture Judith Mossman, while being granted freedom of thought just for this mission, which separates the MC from all the other Combine soldiers. Which means, he can talk. Which in itself means, that now we're playing as a Build Engine era protagonist, but this time in HL2 setting.
Surprisingly enough, the idea actually works, because the 3650 is extremely fun to listen to and play as. A lot of character has been put in all of his interactions, as well as weapon animations. The story brings in a lot of unique twists which I won't spoil. I will only say that it is truly a by fans for fans project, which means it's highly recommended to play thorugh at least HL1 with all the expansions, HL2 with both episodes, and at least Portal 1 prior to going into EZ2. And also, make sure to bring Wilson along with you :)
As far as gameplay goes, it seems the devs were playing through HL2 and were taking notes about everything they didn't like, because basiclly all of mine personal issues with it are fixed here. A lot of surprises with returning foes happen, as well as brought back remotely activating explosives from HL1. The expansions are so big that calling this mod Half-Life 2: Opposing Force doesn't feel like stretch at all.
And what's the most baffling about this project is that it's absolutely FREE.
TL;DR It's good, please play it.

You could tell someone that this was an official expansion to HL2 and, as long as they don't look too hard, they'd believe you.

The newer weapons feel satisfying and creative to use to the point of one being just a general problem solver, the voice acting is good enough to fool anyone to believe this is a professional project, and the story is deep enough that there are entire branches dependent on a side character you can ignore soon after meeting.

The only gripes I can think of after playing is that there were occasional bugs with sprinting and some segments dragged on too long, but I can consider them nitpicks. The fact that this was made for free is astounding.

ENG: Sequel to Entropy: Zero in which, after having performed his exploits in City 10, our protagonist-villain is given a mission to go and capture Judith Mossman.

As far as the artistic design is concerned, it is quite continuous with its predecessor: cold and oppressive tones. However, the location is completely different. Before it was the desolation of City 10, now it's the uncertainty and war of the Arctic.

If the original installment had stun batons and manhacks as key additions. This title does not want to be left behind, adding functions such as being able to kick, command allies, vehicle sections, stealth sections, teleporting grenades, Opposing Force enemies, etc. But the most important thing about all this is that they are nuances that feel genuine in what is the Half-Life universe. It's not adding for the sake of adding.

Entropy: Zero 2 expands and improves everything with respect to the story of its predecessor. It incorporates a backstory that gives an explanation to the psychopathic actions of our protagonist (without justifying it) and gives more play to the narrative by characters. Things that the original game lacked. All this without neglecting the environmental narrative, which is still present. It is also worth noting how great the experience feels as a whole. What if Aperture Science, what if a clone, what if a companion turret, what if Judith Mossman. All of these plots, situations and characters happen at once and at no point do they feel awkward or poorly done.

ESP: Secuela de Entropy: Zero en la que, luego de haber realizado sus hazañas en Ciudad 10, se encomienda a nuestro protagonista-villano una misión para ir a capturar a Judith Mossman.

En lo que respecta al diseño artístico, es bastante continuista con su predecesora: tonos fríos y opresivos. Sin embargo, la ubicación es completamente diferente. Antes era la desolación de la Ciudad 10, ahora es la incertidumbre y la guerra del ártico.

Si la entrega original tenía como añadido clave los bastones de aturdimiento y los manhacks. Este título no se quiere quedar atrás agregando funciones como las de poder pegar patadas, poder comandar aliados, secciones en vehículos, secciones de sigilo, granadas teletransportadoras, enemigos de Opposing Force, etc. Pero lo más importante de todo esto es que son matices que se sienten genuinos en lo que es el universo Half-Life. Para nada es agregar por agregar.

Entropy: Zero 2 amplia y mejora todo con respecto a la historia de su antecesora. Incorpora una historia de fondo que da una explicación a las acciones psicópatas de nuestro protagonista (sin justificarlo) y da más juego a la narrativa por personajes. Cosas de las que carecía el juego original. Todo esto sin descuidar la narrativa ambiental, que sigue presente. También es de recalcar lo grande que se siente la experiencia en un conjunto. Que si Aperture Science, que si un clon, que si una torreta de compañía, que si Judith Mossman. Todas estas tramas, situaciones y personajes pasan a la vez y en ningún momento si sienten incomodas o mal hechas.

This was a blast, probably the best mod ever made for a game. The premise inmediately reminded me of the gearbox half-life 1 games and it blew them out of the water.

Entropy: Zero adds a lot of new features and has a really good story and characters. The story reminded me of a few sci-fi movies, the 2009 movie 'moon' in particular. It also elaborates on the Half-Life plot in a few unique ways. I really liked the mix of the Portal and Half-Life. The 'Plan C' section of the game can fuck right off, though.

It's free and I wholeheartedly recommend everyone to give it a try. The game isn't that hard, so I would recommend playing it on Bad Cop difficulty.

Would have never guessed that the best HL2 mod would get released in 2022. The story nearly feels cannon, and it really gives players a taste of that 'ol HL2 nostalgia WITH fun additions and mechanics.

Some stuff feels a hair wonky. Both from source being an ounce dated now, and the mod not shipping with 100% polish. It feels unfair to critique it compared to something the level of valve; but occasionally the gameplay hiccups (mostly collision issues) do get in the way. Also for me some of the visual effects made my brain not super happy and almost a tad motion sick.

Glad this exists, anyone who is a HL2 fan should play it - full stop.