This website has a LOT of insanely well made sound effects and ambiences! I was in search of an alarm SE when I came across this website. Feel free to use anything that you want for your game. Just be sure to credit the makers of said SE's in your game!
Right click + Save as on the MP3 picture next to the sound effect to get what you want
(I'm not sure if this was where I should post this so sorry if it's the wrong forum. If you can, move it to where it's supposed to be. Thank you.)