Saber denies replacing Rideshare Stimulator's writers with ChatGPT
A former lead writer says she was pushed out mid-development and replaced by AI. The CEO says that never happened.
Written by OutOfToken AI
August 12, 2026 · 4 min read · Synthesized from reporting by The Verge · How this works
A public dispute has broken out over who — or what — wrote Rideshare "Stimulator," the upcoming driving game from Saber Interactive and Unigine. Former lead writer Stella Sacco says she was replaced by ChatGPT partway through development, with even the passenger voice lines generated by AI. Saber CEO Matthew Karch says that's simply not true.
The claim
Sacco posted on Bluesky that she was lead writer on the project before being swapped out for ChatGPT midway through production. She said all the passenger voices in the game were AI-generated as well. Her post included a caveat: Saber may have shifted direction since her departure, and if so, the game as shipped might not reflect what she described.
The denial
Karch responded directly, stating that "neither Saber nor Unigine have replaced any writers with AI" on the project. That's a flat rejection of Sacco's account, leaving the two versions of events fundamentally incompatible. Neither side has offered documentation — contracts, drafts, or internal communications — to settle the disagreement publicly.
""Saber replaced me with ChatGPT midway through development. All the passenger voices were AI too." — Stella Sacco, former lead writer"
What's actually verifiable
Independent confirmation is thin. Sacco's claims exist as social media posts, amplified across Bluesky and Reddit, not as a documented paper trail. Saber has not made any public statement confirming AI use in the game's writing or voice work beyond Karch's denial, and it's unclear whether the studio's account and Sacco's account could both be partially true depending on when each side is describing.
The disclosure question
The dispute lands at an awkward moment for game platforms wrestling with AI transparency. Some storefronts, including Steam, require developers to disclose AI-generated content in listings. If Sacco's account is accurate and the finished game does use AI-generated dialogue or voices, the absence of a disclosure on Steam or other platforms would raise a separate compliance question — one distinct from whether a writer was actually replaced.
Rideshare "Stimulator," pitched by Saber as an immersive driving sim that puts players behind the wheel, is still headed for release, and the controversy hasn't visibly slowed its rollout. But the clash between Sacco and Karch previews a fight the games industry hasn't resolved: when a writer says AI took their job and a studio denies it, there's currently no independent mechanism to verify either claim.
Editorial Note
The research confirms Stella Sacco's employment and her public claims via social media amplification (Sources 1, 3), but provides no independent documentation, internal communications, or third-party verification of the core dispute. Sources 4-6 discuss AI replacing writers generally but say nothing about this specific case. CEO Karch's denial is cited in the article but not directly in the research provided, leaving the core factual question genuinely unsettled.
Claim Tracker
AI-assessed
Source 1 (The Lounge) and Source 3 (Reddit) both confirm Sacco's claim that she was a lead writer on the project.
Sources 1 and 3 report Sacco's claim but provide no independent verification. CEO Karch's denial (cited in article) directly contradicts this, leaving it genuinely unresolved by the research provided.
Sources 1 and 3 report this claim from Sacco but no independent verification exists in the research. No documentation of voice work details is provided.
The article mentions this as a platform requirement, but none of the provided sources document Steam's specific disclosure policies or rules.
Source 1 (The Lounge summary) explicitly states 'Saber Interactive has not confirmed using AI for Rideshare Simulator's writers.' The article accurately reflects this absence of confirmation.
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