So after updating and realizing the keypads are active now, I tried to make a map of the bunkers and keypad codes. I have found that they function similarly to the old red access cards, but with a blue card variant that coincides to different bunkers this time. The bunkers colored in red need red cards, the ones in blue need blue cards, and the yellow ones need codes. The yellow ones are unfinished, as I could not get them to work using the old codes and even trying them backwards like some suggested. I also added the secret rooms. If anyone knows how to get the remaining bunkers (0, 1, and 3) please let me know so I can put them on here!!
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Finally!!!! Back to 2020 
Bunker 0 no longer needs a red card and requires a password, but no one knows what the password is
Perfect