Big-O .Inc
Big-O .Inc is a free adult text-based incremental game that plays instantly on PC or mobile with no download. Emily Harris has just been put in charge of a neurotransmitter production facility, and keeping it running means overseeing research, acquiring subjects, and handling business relationships. You monitor production and hire staff as the numbers climb, with emails and conversations bringing the story into the working day. Reading makes up a large part of the experience, and Emily's story follows a mostly fixed path.
The writing is the main reason to settle in, especially if you enjoy workplace stories with a management routine alongside them. The developer states that the project was made without AI assistance. Some passages could be shorter, though, and the incremental side offers long stretches of waiting with relatively few surprises. The interface also takes getting used to, particularly when moving between machine and employee statistics. Dialogue options don't consistently change later responses, so treat them as small interactions within Emily's story. If you like following a written narrative while keeping a facility ticking along, there's an unusual combination here to try.
Press Play and start directly in your browser with no separate installation.
About the Developer: Created by Maliface - visit the developer's page for updates and more work.
Game Info: HTML adult text-based incremental game | by Maliface | Facility Management / Female Protagonist / Linear Story | English.
Updated to 3.5.11 on June 26th 2026.
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