Here are 4 variations of sci-fi sirens.Yes they are annoying , but sirens should be like that don’t you think 
I hope that they will fit in some game project or something like that.WAV and MP3 files are included.
Sci-fi Siren 1: 0:13
Sci-fi Siren 2: 0:13
Sci-fi Siren 3: 0:06
Sci-fi Siren 4: 0:06