Dark Souls 2 Seamless Coop: The Glitch That Ruined The Game? - Critter Realm

August 3, 2026 · Critter Realm

The '4B30' bug and fixes are trending again as players replay Dark Souls 2.

Dark Souls 2 Seamless Coop: The Glitch That Ruined The Game? is a broken summon that corrupts memory and locks multiplayer. This exploit lets one player become unkillable, crashing sessions for everyone. Studies indicate this rare bug turns friendly invasions into chaotic crashes.

Memory corruption turns co-op sessions into unstable nightmares. When the host player loads certain areas, client memory can desync. Research shows poorly managed pointers cause worlds to split. Often, one summoned character breaks level boundaries, trapping others.

Expect harsher sessions and always test worlds cautiously.


Can this crash be fixed on current saves?

Patchers cleared the flag, but legacy slots may stay broken. Starting anew remains safest.

Does FromSoftware officially address seamless co-op bugs?

Patches targeted stability, yet community reports still surface. Server checks reduced crashes over time.

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