Compression algorithms (like WinRAR, 7-Zip, or FreeArc) work by finding repetitive patterns in data. A texture file of a brick wall might store "brown pixel" 10,000 times; compression stores it once and says "repeat this 10,000 times."
However, most modern game files (videos, audio, textures) are already compressed. A 100MB installer would represent a compression ratio of 100:1. For reference: Compression algorithms (like WinRAR, 7-Zip, or FreeArc) work
If you find a file labeled The Amazing Spider-Man 1 PC Game Highly Compressed 100MB Install, nine times out of ten, it is not the full game. Instead, it is: The Bad:
If you decide to find the legitimate 8GB version, here is the actual review of the game itself: Compression algorithms (like WinRAR
The Bad: