★★★★★(3)
Zero Sum
by Only One
About Zero Sum
Zero Sum, by Only One in Ren'Py, follows a testing-division manager promoted to lead Project Icarus. He must finish the Phoenix algorithm and sell it: software that studies customer habits and raises taxi fares when users are vulnerable. More data means more profit. He learns the job is not luck but a path where ethics and earnings clash, and each choice changes the project and his life. Someone already knows too much and waits for a mistake. The game uses 3D CG and animation, with a male protagonist and humor.
The current build is v2.0 EP.2, released June 29, 2026, and the project remains ongoing as an episodic game. Episode 2 directly continues Episode 1, carries choices forward, adds new characters, and gives 30% more renders than the first episode. It also introduces the first serious choice affecting the protagonist and Alice. The game runs on Windows, Linux, Mac, and Android, offers English, Spanish, and Russian, and is uncensored.
Developer's description
An ordinary testing department manager unexpectedly gets promoted to lead Project Icarus. His task is to finalize and bring to market the "Phoenix" algorithm — a system that analyzes user behavior and dynamically raises taxi prices during moments of vulnerability. The more the algorithm learns about customers, the more money it makes. Soon, the protagonist realizes: his promotion isn't a gift from fate. It's a ticket to a world where morality and profit never align. Every decision changes not just the project's fate — but his own. Spoiler But the truth doesn't stay hidden forever. Someone already knows too much about the project. Someone is watching. Someone is waiting for a mistake. And when it happens — there's no turning back.
Zero Sum screenshots
Download Zero Sum v2.0 EP.2
Win/Linux
Android
Changelog
Player reviews
What players say
Most players rate it solidly, praising visuals and adult scenes, while one critic finds story and writing weak.
Players like
- Models look realistic and attractive
- Adult scenes are appealing
- Animation quality is strong
Common complaints
- Story and dialogue feel weak
- Writing and grammar need work
Best for players who want realistic adult drama with controversial ethical situations.
Summarised from 3 written player reviews.
Similar games
