Mammaxa
About Mammaxa
Mammaxa is a Ren'Py dating sim by Expanding Universe Games, presented with animated 3DCG art. You play a male protagonist whose relationship with his girlfriend is developing slowly. The story introduces Mammaxa, a costly drug that produces limited natural breast growth, and Glutamax, a companion substance that thickens the lower body. Both are designed to leave users wanting more. Roommate Hannah advises being more dominant and honest, and after your girlfriend sees you viewing curvy women, you must decide whether to follow that advice.
The current build is v0.1, an initial release dated September 11, 2026, indicating ongoing development. It is available for Windows and Linux in English, with no censorship. The latest changelog simply records this first public version, so the available content centers on the opening premise and the relationship choice triggered by Hannah’s advice.
Developer's description
his game is an introduction to Mammaxa a new drug offering natural breast growth paired with, Glutamax which is focused on growing glutes, thighs and quads, making the user thicker. Neither drug is cheap, and both only offer limited growth, often leaving the person taking it left wanting another dose. Things are progressing slowly between you and the girl you're seeing until you get some helpful advice from your roommate Hannah. She suggests being both more dominant and honest, and when your girlfriend catches you looking at images of curvy women, it sets events into motion, offering the choice of whether to follow her advice.
Mammaxa screenshots
Download Mammaxa v0.1
Changelog
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