Ubisoft's Ghostwriter AI wants to script NPC banter

Writing crowd chatter is the video game industry's equivalent of digital grunt work. In sprawling open worlds like Assassin’s Creed or Far Cry, non-playable characters need to mutter, swear, and react to everything you do, but penning thousands of these tiny lines—known in the industry as "barks"—can drain a narrative team dry.

Ubisoft just unveiled Ghostwriter, an internal AI tool designed to take over that drafting process so human writers can spend their energy on main storylines instead.

Turning crowd noise into automated drafts

Ghostwriter works as an assistant rather than a replacement. A narrative designer first defines a character profile and the exact interaction trigger they need. The AI then spits out a batch of dialogue variations for the writer to edit and polish.

To make the system smarter over time, Ubisoft built in a pairwise comparison workflow. The tool presents two generated variations side by side, and the writer picks the better one. Ghostwriter learns directly from that preference, with Ubisoft betting that thousands of editorial choices will gradually tune the model to production standards.

Ben Swanson, the Ubisoft R&D scientist who created the tool, says the goal is to give narrative designers direct control over their own AI systems. His team even built an auxiliary tool called Ernestine, which allows developers to train their own custom machine learning models for specific narrative needs.

The announcement still ruffled feathers across the industry. Several game writers and indie developers took to social media arguing that studios should invest in hiring more human writers instead of software. Ubisoft quickly defended the project on Twitter, reiterating that Ghostwriter was built alongside narrative teams simply to generate line variations.

Why it matters

We think Ubisoft picked the smartest possible wedge for generative AI in game development. Instead of overpromising an autonomous storytelling engine that can write quests, they targeted "barks"—a repetitive, low-stakes task that eats hundreds of manual hours without driving core plotlines.

For narrative designers, having a system generate rough background chatter could eliminate the blank-page fatigue of coming up with fifty slightly different ways for a guard to say "Stop right there!" The pairwise ranking loop is also a clever way to keep human taste at the center of the pipeline while passively collecting training data.

However, the immediate pushback from game writers reveals the real tension. Creative teams aren't mad about skipping repetitive dialogue; they fear that tools pitched as harmless assistants will eventually be used to justify shrinking narrative departments or reducing writers to simple prompt editors.

Ubisoft’s approach shows where production-grade AI is actually landing in AAA development: quiet, modular tools plugged into existing engines. But whether it genuinely frees writers or just raises their output quotas remains to be seen.