This is a compilation of all the eerie announcements that sporadically play in Alterna. Listening to the ripped audio without the reverb added in-game, you notice that it's actually English speech!
For this video I tried to transcribe as much of the sentences as possible.

0:00 Announcement 1
0:20 Announcement 2
1:15 Announcement 3
1:42 Announcement 4
2:15 Announcement 5
2:45 Announcement 6
3:10 Announcement 7

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