You can plug in your phone, download an emulator, or install the Google Play Store to access Android apps on your computer. Some tinkering may be required.
When a videogame wants to show a scene, it sends the GPU a list of objects described using triangles (most 3D models are broken down into triangles). The GPU then runs a sequence called a rendering ...
Back in the 1980s, your options for writing your own code and games were rather more limited than today. This also mostly depended on what home computer you could get your hands on, which was a market ...