Mushroomia 1.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Gta_sa.exe is the common file name to indicate this program's installer.
We recommend checking the downloaded files with any free antivirus. Some of Mushroomia aliases include "Grand Theft Auto San Andreas - Mushroomia". Mushroomia lies within Games, more precisely Action. The most popular version of the software is 1.0. The actual developer of the free program is GTAMaps developers community. You can launch this free PC software on Windows XP/Vista/7/8/10/11 32-bit.
From the developer:
Mushroomia is a Grand Theft Auto: San Andreas modification. It brings you a new map that you can explore and a story line filled with jokes and epic moments that will improve your gameplay experience. The mod must be installed on a fresh GTA - San Andreas with no other modifications.
You may want to check out more software, such as Ballmaster 2, Virus or Bomb John, which might be similar to Mushroomia.