system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If music CDs are burned with the opening tracks towards the center, how are open-world video game discs burned?

Like Fallout 4, for example. You can walk anywhere, do anything, talk to anyone, at any time. How is that all rendered onto the disc when it’s not exactly chronological? 

**EDIT**: thank you everybody! I appreciate you all taking the time and I learned a lot from all of your answers! I read through each and every one.
gpt
Ignoring the hard drive element of modern games, for games that *did* run entirely from the disc, the non chronological nature of their storage wouldn't have been a problem. Unlike a music CD, it wasn't necessary to read the disc from start to finish in one go. (Indeed, even with a music CD, you can use track select to change the order in which it is read.) When a game needed to load more data from the disc, it would know where on the disc that is located, and start reading from that point.

There would still be some care taken with data placement - the time taken to find the correct location on disc (seek time) is a factor in the overall loading speed, especially if the system is constantly jumping around for fragmented data.