Rounding Error

At 2:17 a.m., at 4,200 metres in the Atacama desert, Dr. Talita Brum discovers that the universe has corners.

Forty-one cosmic rays, far too energetic to exist, all arriving along three perpendicular axes — as if space were a grid. As if someone were saving on resolution.

Rounding Error is a hard sci-fi comedy visual novel about an insomniac astrophysicist, a hypochondriac lattice physicist, a retired German professor who writes everything on napkins, an ops manager armed with silver tape, a llama called Heisenberg… and the cold, overworked process that schedules our simulated universe — which has just read their paper.

Publish too early and the internet turns you into a Matrix meme. Threaten the Operator and your galaxy goes read-only. Write a sloppy bug report and the Milky Way gets optimized. Or be kind — and find out what a cosmic scheduler has been waiting 13.8 billion years to ask.

Based on the novel Erro de Arredondamento by Prof. Leonardo Gomes Guidolin. The science is real (the book's afterword is in the in-game codex, separating fact from fiction).

What's inside

• 12 chapters + bonus chapter "Heisenberg's Day" (told by the llama)
• ~4–5 hours for a first playthrough, ~10 hours to see everything
• 10 endings — true, romance, mentor, friendship, comedy, three bad ones and 1 secret ending
• New Game+ "Operator's Log": every chapter gains a new scene from the Operator's side
• 60+ choices that change scenes, relationships and the bug report that decides the galaxy's fate
• 61 codex entries (people, places, real science, in-story documents) and 34 achievements
• Over 80,000 words per language — full English and Brazilian Portuguese, switch anytime
• 14 original music tracks, including the ending song "Expensive to Delete"
• Auto-save, 3 save slots, backlog, auto/skip read text, mobile-friendly

Free demo

Play chapters 1–2 free in your browser (about 1 hour). The full game is a single offline HTML file that runs on Windows, Mac, Linux and Android — just open it in a browser. US$4.99.

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Português

Às 2h17 da madrugada, a 4.200 metros de altitude no Atacama, a Dra. Talita Brum descobre que o universo tem quinas. Quarenta e um raios cósmicos que não deveriam existir, alinhados em três eixos perpendiculares — como se o espaço fosse uma grade. Como se alguém estivesse economizando na resolução.

Erro de Arredondamento é uma visual novel de comédia de ficção científica hard, baseada no livro de mesmo nome do Prof. Leonardo Gomes Guidolin. Uma astrofísica insone, um físico hipocondríaco, um professor alemão que escreve tudo em guardanapos, uma gerente de operações armada de silver tape, uma lhama chamada Heisenberg… e o processo cósmico, frio e sobrecarregado, que agenda o nosso universo simulado — e que acabou de ler o artigo deles.

• 12 capítulos + capítulo bônus "O Dia de Heisenberg"
• ~4–5 h na primeira jogada, ~10 h para ver tudo
• 10 finais, incluindo 1 secreto, e Novo Jogo+ "Log do Operador"
• 61 entradas de códex com a ciência real do livro, 34 conquistas, 14 músicas originais
• Mais de 80 mil palavras por idioma — português do Brasil e inglês completos
• Demo grátis (capítulos 1–2) no navegador. Jogo completo em um único arquivo HTML offline (PC, Mac, Linux e Android) por US$4,99.

📸 Screenshots / Capturas de tela

Also on itch: the original novel Erro de Arredondamento (PT-BR ebook).