system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Preloading

Okay. So a game is preloaded onto my system. How does the manufacturer ensure i cant play it before hand? How does the preloading work?
gpt
Generally using a combination of two methods:

1. They download all of the game's assets (3D models, textures, videos, scripts etc.) and leave out the main executable, which is comparatively small.
2. Everything that is downloaded is encrypted, and the key is only provided on the release date. The game is then decrypted using the key.