An ISO file is a single digital replica of a physical optical disc. When you search for pcgta san andreasiso , you are looking for the DVD/PC version of the game packed into a .iso or .bin/.cue format.
One reason the game remains a staple on PC is its accessibility. While modern titles demand expensive GPUs, the classic San Andreas is incredibly light. According to System Requirements Lab , the original game only recommended 384 MB of RAM pcgta san andreasiso