Note: Because the game features high-end graphics and large modded maps, ensure your device meets the minimum requirements regarding RAM and processor speed. For PC Users

Visit the official Proton Bus Simulator website or check their designated distribution platform (such as Steam or direct installer links provided by MEP). Download the Windows setup installer for Fase 3.1.

Before you download, it helps to know what you're getting into. Proton Bus Simulator isn't just one game; it has two main branches:

Proton Bus Simulator Fase 3.1 represents a unique moment in mobile simulation history, where the game's features finally matched the creativity of its community. By downloading the base game and sourcing Phase 3.1 mods from trusted repositories like , you can enjoy thousands of hours of realistic bus driving for free.

Inside the files directory, ensure you have folders named buses and maps .

The map engine handles circular lines, complex turnarounds, and multiple terminal stops smoothly.

: Navigate to the official listing for Proton Bus Simulator Urbano on Google Play . Regular stable version iterations automatically include the core Fase 3 map structures (integrated from version v290 onwards).

: Drastically reduced memory usage to prevent crashes on mid-range Android devices.

is the definitive choice for virtual transit operators seeking an open-ended, highly moddable driving experience on mobile and PC. Developed by MEP, this version standardizes advanced open-world map streaming and multi-tier mod support, removing loading screens completely. If you want to expand your virtual garage with highly realistic buses and customized regional maps, downloading the Fase 3.1 engine is your critical first step.

Go to your device's settings > Apps > Proton Bus Simulator > Storage > Clear Cache.