Little Nightmares III Co-op Not Connecting? Start Here

Little Nightmares III co-op tends to break at one of four points, and checking them in order gets most people playing again fast.

Can't even find your friend to invite them? That's a platform account problem, not a network one. Confirm you're actually friends on the same platform you're both playing on, that you've both enabled crossplay if you're on different ones, and that you're both on the same game version. This is the cause more often than people expect.

Invite works but joining fails? That's almost always NAT. Turn on UPnP in your router and reboot it. If NAT still reads strict afterward, you're likely behind your ISP's carrier-grade NAT, which only they can change.

Connects but freezes or drops after a few minutes? The link formed but it's unstable. Get off Wi-Fi, pause any background downloads or cloud backups, and reboot a long-running router. Little Nightmares III wants steadiness more than speed.

Connects and holds but the whole session feels laggy? Then the connection is stable and the distance between you and your friend is just large. Geography sets a floor you can't remove, but a bad route on top of that floor can be improved, and a game routing tool like GearUP does exactly that by taking a cleaner path between the two of you. Across long distances the difference between a good route and your ISP's default is often enough to move a session from painful to playable. A general VPN, by contrast, stacks another layer of NAT on top and usually makes peer co-op worse.

Two quick things to rule out before any of that: make sure you're both actually on the co-op menu and not the solo mode with the AI companion, and make sure neither of you left a single-player run half-open, which can quietly suppress the invite. Most co-op failures here are one of these five, and once you know which, the fix is short.