: Maps and buses designated as "Phase 3.1" must be downloaded separately from community portals or developer-recommended links and placed in the game's internal mods folder. Conclusion
: Select the Mediafire or Google Drive link from the official "trees" page. proton bus simulator fase 3.1 download
Visit the official Proton Bus "Trees" (Arvores) site to find the most current builds. : Maps and buses designated as "Phase 3