The Witcher 3 gets multiplayer with Witcher Online

At its best, Witcher Online feels less like a “raid party” mod and more like a presence mod: you can join servers, see other players out in the world, and even roleplay a bit with chat, emotes, and tavern downtime. It leans into custom looks too, syncing armor and weapons while also supporting “Custom Player Characters,” including swapping into NPC models (and even syncing base-game Ciri).

The technical flex is the sync itself. Movement is mirrored with matching animations (running, swimming, horse/boat riding, climbing, rolling, and more), and combat sync goes beyond basic sword swings: signs, parries, dodges, crossbow aiming, bomb throws, finishers, Quen bubble, and even player death states are all covered. If you’ve ever watched a friend cast Quen slightly too late, you’ll appreciate how granular this gets.

Witcher Online, published by mod author rejuvenate7 requires a legitimate Witcher 3 Next-Gen install on Steam or GOG (v4.04+), and it lists Hearts of Stone plus Blood and Wine as DLC requirements. Setup also involves launching the game with -net, and -debugscripts set up in Steam's launcher, and the current Nexus listing shows version 1.02 with a last updated date of January 19, 2026. Some other mods, such as Chill Out, and Custom Player Characters have full compatibility and facilitate some of the immersive interactions players can experience together.  

The mod isn't trying to be “true co-op questing” yet, and that distinction matters. The play guide notes that only player locations are synced, not quests, NPCs, or world state. The recommended approach is basically staying in lockstep: enter cutscenes together, complete objectives together, and pick the same dialogue choices. It’ll work, but you’ll want some coordination, or things can get a little weird. As with most multiplayer mods made for single-player games, the mod is very much so a work in progress, and has the kind of jank that comes with such an ambitious project. That being said, when it clicks, Witcher Online delivers the exact kind of “shared Continent” vibe fans have been dreaming about, turning routine rides between contracts into spontaneous meetups and chaotic tavern detours that The Witcher 3 was never designed for, but somehow still wears surprisingly well.