Callisto-X
Game Information
Developer
ProfessorX-10Version
v1.21
Engine
Ren'Py
Release Date
Aug 28, 2025
Last Update
Oct 24, 2025
Censorship
Uncensored
Overview
Callisto-X throws you into a thrilling interstellar adventure as a former military officer turned space trader, where your choices shape your crew's fate among the stars.
The Story
As Captain of the Callisto, you'll navigate treacherous alliances and forbidden romances with an eclectic cast of monster girls, all while trying to keep your ship and crew intact in this expansive sci-fi sandbox.
Gameplay & Mechanics
Explore diverse planets, engage in turn-based combat, and manage your resources as you make tough decisions that shape your relationships and the game's branching storyline. Unlock animated 3DCG scenes featuring a variety of sexual encounters and group activities with your monster girl companions.
Key Features
- Sci-Fi Sandbox Adventure: Explore vast galaxies, interact with unique NPCs, and engage in turn-based combat.
- Relationship-Driven Storyline: Build relationships with monster girls through conversations and choices that shape the game's branching narrative.
- Animated 3DCG Scenes: Unlock explicit animated scenes featuring a variety of sexual encounters and group activities.
Download and play Callisto-X now on Gaxload.
Installation
1. Extract to desired location. 2. Click on "Callisto-X.exe" to start playing.
Changelog
- v1.21
- -- Final Upgraded version
- -- Revised Main Menu.
- -- New Intro scene skip function for repeat players.
- -- MC back story scenes added
- -- Callisto character added.
- -- Optional ending modified
- -- Integral Walk through, text and UI modifications in Preferences Menu
- -- typo corrections and bug fixes.
### 1.0
- v1.0
- Completed
- Over a dozen previous scenes corrected, changed and improved
- Final Battle scenes completely redone and animated with over 150 new images, sound effects and 2,000 lines of coding.
- Added a completely new optional story plot to end the story with over 200 new images and 800 lines of code & text.
- Innumerable text English to American text revisions and typo corrections.
### 0.90
- v0.90
- Story Continuation in preparation for final release
- Several Story changes with:
- Five new scenes containing:
- 125 lines of text, over 80 new images
- Minor text corrections
### 0.80
- v0.80
- -Continued -Completed Party Orgy Scene to introduce next Chapt.
- -New Walk Through Option Added (see Dev. Notes)
- -Added Android Port [with thanks to Yopi]
- -Minor text corrections
### 0.78
- v0.78
- - Changed Tiffany’s first h-scenes animations
- - Changed / corrected Text timing errors in introduction
- - Revised story flow
- -Added compressed versions
### 0.75
- v0.75
- - Main page image changes
- - Continuation of Heleon / Krillen main story line
- - Revised-improved story line with new ending
- - 5 new interaction scenes added
- - 2 new mini-games added
- - New animations of battle scenes
- - Voicing and sound effects added
- - Improve voicing and text in all h-scenes including Tiffany’s first
- - Revision of alley fight and image improvements
- - News story changes and upgrade
- - Improved text correct typos
### 0.33a
- v0.33a
- Initial Release
