How Half-Life 2 Strider sounds were created...
Ok so this is basically what I did:
1 - I imported Minecraft Cat meows to FL Studio
2 - I added a low pass filter so only the fundamental frequency of the meow can be heard
3 - I added some MAD Distortion using the Sausage Fattener... you can use NANI if you want
4 - And finally, I added some huge reverb
(This video is a joke btw, Half-Life came out in 2004 and Minecraft was released in 2011. Still, the theory of a cat meow used to create the strider sounds seems plausible).