if you download the full game can you get it to download to the quest 2 like go into the files and add it of put the files in side quest and download it to my quest from there i want to buy the full game but idk if it can be played without being hooked up to my pc?
To sideload it onto the quest yes you need to be plugged in. And to play no the quest has its own operating system running android meaning you can install APK's directly to your headset. Go download sidequest from http://sidequestvr.com/ , from there you can install many other games directly onto your headset from itch.io ect. Here is a tutorial for sidequest