You, like many other players, might have asked, "Is Titan Quest 2 Multiplayer?" Well, there's a short answer and a long one. The short answer is yes, Titan Quest 2 does have a Multiplayer mode. You will be able to band together with up to three other friends to take on mythical creatures from antiquity.
Even though the original Titan Quest is a single-player game first and foremost, it does have substantial multiplayer features. Up to six players can enjoy the story together in a co-op manner as well as create and edit maps, which can then be shared later. Titan Quest 2 does not have as much going for it in Early Access yet, but this is a front where the game will certainly improve in the future.
Titan Quest 2 Multiplayer is here, but it's in beta

When you launch Titan Quest 2, you are given the option to choose between single-player and a beta Multiplayer branch. The multiplayer right now supports up to 4-player co-op, and all of the other players needs to both own the game and launch the Multiplayer client to party up.
How functional is the multiplayer? Well, you and your friends can pick up whatever class combinations they want, and it also opens up additional gameplay directions like focusing on CC while your friend(s) focus on damage with feats and passives that benefit from hitting stunned enemies.
However, multiplayer is currently quite janky; after all, it's in beta. Even though it's infrequent, you will run into sync issues and Skill execution bugs. On top of that, the balance of the game is not tuned separately for Multiplayer. There's also no additional bells and whistles like matchmaking, so you do need to set up your party on your own (which involves getting a friend willing to play co-op in an ARPG).
For now, Titan Quest 2's Early Access is quite barebones, with only a few hours of content - so you can just sample the Multiplayer mode as a slight taste of what's possible in the future.

As per official information, the game will be in Early Access as long as the developers feel the need. The goal is to hit a 1.0 release by the end of 2026, but that's not set in stone. As such, we could see Titan Quest 2 Multiplayer come out of beta in six months, once the game is more stable in Early Access, or released alongside v1.0 when that period ends.
Another fact to consider that multiplayer features are generally not on the top of the list for ARPGs. This is true for live-service online-only games like Path of Exile. By contrast, Titan Quest 2 tries to emulate the old-school single-player ARPG experience, so making the co-op better may take a backseat in terms of priorities.
We could also get a progress update in the following months that sheds more light on things such as additional Classes, Masteries, and of course, the Multiplayer features. For the time being, we just know that major updates are coming every few months, as revealed in the first-ever Titan Quest 2 Early Access roadmap recently.
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