To play v1312310 Extra, you can find it on Patreon, itch.io, or third-party download sites. Basic system requirements include at least Windows XP or higher, 2.0 GHz Core 2 Duo processor, 2 GB RAM, and OpenGL 2.0 or DirectX 9.0c compatible graphics.

Players navigate various locations, manage daily routines, complete specific triggers, and converse with a broad roster of female characters.

If you want to dive deeper into the specific mechanics, let me know: Which you are trying to complete If you need help finding the save file location Whether you are playing on PC or Android Share public link

While primarily developed for Windows and Mac , this build also saw the introduction of an Android port for mobile play. Narrative & Gameplay Overview

Resolves critical progression blocks and minor script errors.

Early in his journey, a bizarre creature grants Derek two life-altering transformations: a massive physical upgrade and a sarcastic inner voice.

The project , developed by Astaros3D , reached its final release phase as of late 2025. While you specifically mentioned version v13.12310 Extra , more recent updates, such as v16.10260 Extra , have since been released. Version & Status Report

: A comprehensive menu that allows players to rewatch all adult scenes directly without replaying the main story. Full Multi-Language Support

The narrative incorporates supernatural elements where Derek interacts with a mysterious entity that grants him unique physical attributes and a persistent internal monologue that influences his decision-making throughout the game.