GMDX is an award-winning large-scale modification for the 2000 PC classic Deus Ex. GMDX addresses the many flaws of the game, polishes it to a very high standard, and adds new layers of depth that one would have hoped to see in a sequel. GMDX is executed with the strict parameter of staying true to the original design principles that define Deus Ex, and seeks to improve all aspects of design excluding the plot and soundtrack. The cumulative result thus far is said to be, and aims to be the "definitive Deus Ex experience".

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(Note: This review is for v8.0, an update for v9.0 is in the works)
When v7 came out, I thought that GMDX was basically finished - after all, there is only so much time you can spend on fixing the smallest of details and tweaking balancing issues until you run out of steam. Most mod authors at this point either give up entirely, start refurbishing old stuff that does not need retouching (hello Revision), or just add random elements for the sake of adding anything new (looking at you, Misery 2.0). Not so GMDX.
v8 is easily the biggest update so far, adding a slew of new bugfixes, many of them for the original game, some very helpful interface tweaks (item swapping, better fonts, colored descriptions), major difficulty and AI enhancements, sounds, models (better variation, gibbing), and, biggest of all, perks.

When leveling up a skill, you can now choose to invest a smaller amount of points to buy unique feats meant to support the main skill they are attached to. This makes for some tough choices where you suddenly consider a skill not really fitting your playstyle just for obtaining the perk(s) or decide between saving points for upgrades or spending it on more perks, which makes the already heavily rebalanced skill system even better.

The other big improvement is enemy AI. The vanilla AI can basically do three things: Patrol, run around and search, or charge directly at you. GMDX already made them a little bit more clever in prior versions but v8 adds a ton of variety to the mix. Enemies conduct their search much more thoroughly but are less predictable in their behaviour and they can throw flares when JC is hiding in dark places. When it comes to a fight, they strafe more, lock on and shoot faster, camp, shoot through breakable cover, or enter melee when you come to close. Different enemies behave very differently (in the original, the AI for an MJ12 trooper and a NSF guard were the same), some received upgrades such as working helmets, and most of the AI characteristics now scale with the difficulty level. If you come back to DX after a long absence, expect a much more challenging game on Realistic.

This kind of variety is what v8 is mostly about: Weapon behaviour was extended (shotgun reloading, new ammo types), augmentations were added and improved (the spy drone can emit sounds now), dozens of new sounds mix up enemy barks or how your footsteps sound on different materials, armors are no longer a one-time-use item, general items like extinguishers see much more use this time around and the levels were updated again with some new nooks and crannies, plus a ton of new fixes. Surprisingly, nothing feels strange or out of place (the stamina system is a little weird but it's scaled back on non-Hardcore difficulties) - GMDX looks and plays like the developers spent another year on an add-in for the original game, with the difference that GMDX is totally free.

If you're looking for "DX, but better", you've come to the right place.

GMDX is a comprehensive "advancement" modification which aims to improve upon almost every aspect of the Deus Ex experience. Gameplay mechanics have been painstakingly tweaked and revised in order to provide far better balance between skills, augmentations, and expendable items. NPC and enemy AI has been altered to behave more realistically than ever before. Meanwhile, each level has been retouched and/or expanded with a number of graphical, decorative, and architectural enhancements which add an extra layer of discovery for veteran DX players. When combined with the New Vision and HDTP mod packages, this “fresh coat of paint” does an outstanding job of remaining faithful to the original artistic vision of Deus Ex while improving the graphical fidelity of the game.

Augmentations, in particular, have been enormously improved. Health Regeneration and Ballistic Resistance no longer throw the difficulty curve out of balance, while the much maligned Aqualung and Microfibral Muscle systems are now significantly more useful and worthy of consideration. Meanwhile, a revamped skills system (which includes new abilities such as Stealth) yields far more variety and actually forces the player to think hard about how to allocate his or her XP.

Throughout it all, the mod manages to preserve the original design principles of Warren Spector and the Ion Storm team while providing much-needed graphical, gameplay, and performance enhancements. This approach manages to breathe brand new life into a 14 year old classic, and I can honestly say that GMDX represents the definitive Deus Ex experience.

A must-play for DX newcomers and veterans alike.


Amazing project with amazing modders, the work done on this piece of art is flawless, this makes the game more entertaining than it already it, such a perfection!


Such an amazing improvement over vanilla Deus Ex. All of that without changing the core of the game. Congrats, imho GMDX is the best Deus Ex overhaul available.

A Deus Ex fan's wet dream.


This mod has come a long way since I first stumbled upon it while searching for a mod for my favorite game of all time. At first it started out as a solid mod with an overpowered muscle upgrade and a dragon's tooth sword that had a ridiculously long range and a laser sight (What was CyberP thinking xd)
But since then it has become more and more complex with dozens of new changes and improvements and has become easily the best overhaul mod for me easily surpassing a lot of other mods for Deus Ex. So I'm fixing my rating up to 10, because it deserves it. Although I'm still hoping CyberP to give Walton an ADS aug xd

Why is this mod so good? Because looking at it, you can see that the creator has thought about every change he made carefully. He didn't do things just because he can, but rather asked himself "Could the game benefit from this change whilst staying true to the original format?" Of course not everything suits my taste, but you can't please everyone. But even with those unwelcome changes it still deserves the 10/10 from me. Would I suggest this to people who love Deus Ex? I definitely would. It kinda feels like that patch the creators never released. Would I suggest it to new players? I would, yes. People say the "hardcore mode" makes the game harder, which it does, but Deus Ex was never a hard game to begin with and besides the lower difficulty settings offer a more casual player friendly difficulty while still keeping most of the awesome gameplay changes that GMDX has to offer. So it's really for everyone who likes Deus Ex regardless of his/her skills. If I could go back in time I would give this mod to my younger self and tell him "Take it and play it, *******. Oh and when you're going to meet a girl named Manon in the future for the first time, then by all means: Shave yourself, you bum!"


The perfect balance of new and old.


This is like every serious mod should look like. It expands upon the game world, fixes bugs and adds new ways to play the game, but doesn't end up with stuff thrown inside just because. It doesn't make the character a walking god, but doesn't turn him into a wimp either. It adds challenge where it should, removes annoyances where necessary. It's meant to improve upon the developers' vision of the game, not replace it with some sort of self-perceived vision of a game.

Unlike Shifter, which takes a game facing difficulty issues (being too easy) and makes it several times easier by drowning the player in skill points, replaceable augs and overpowered unique weapons, GMDX actually capitalizes on choice in a good way (not overly limiting). You're expected to stick to several skills and make a proper use of them instead of skilling everything or just making the obvious powergaming picks. In return, this leads to several play styles, and increases longevity of the game. After you finished a ninja pistol guy, you may want to play as Rambo shotgunner. Both playstyles are viable and equally fun.

GMDX also adds goodies, secrets and makes you want to revisit old maps you know so well and search them again in quest for upgrades and ammo. The enemies are slightly smarter and tougher, making combat more thrilling. Finally, it just adds sense to the game. You no longer just equip a Stealth Pistol + Flamethrower and speed through the game with power of gods. You're still powerful, but there are places where you may find yourself limited. That's exactly how it should be in my opinion.

I highly recommend GMDX if you're a die-hard Deus Ex fan, like me. Unlike Shifter, it TRULY removes the "suck" out of Deus Ex, rather than being a godmode. Jump in and enjoy, it's one hell of an immersive ride.

I just started replaying this game on v6.3. The improvements on v6.2 were great but this takes it to a whole new level. This game remains faithful to the original while improving on it's gameplay and AI in many ways. It adds new weapons like the USP, which has differences from the Regular Pistol. It also improves the Skill system and overall Stealth. It gives a much needed gameplay overhaul to what is my favourite game of all time and I can't thank the developer of this mod more.

This mod is great. The great attention to Deus Ex's gameplay design is the whole reason that this is done so well, and I gotta say, it made me replay Deus Ex twice already.

Plus, as a bonus, it comes with HDTP!

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Highest Rated (19 agree) 10/10

(Note: This review is for v8.0, an update for v9.0 is in the works) When v7 came out, I thought that GMDX was basically finished - after all, there is only so much time you can spend on fixing the smallest of details and tweaking balancing issues until you run out of steam. Most mod authors at this point either give up entirely, start refurbishing old stuff that does not need retouching (hello Revision), or just add random elements for the sake of adding anything new (looking at you, Misery 2.0…

Apr 23 2014 by Marvin42