If you were into Protracker/demoscene music in mid nineties of past century and would like to visit this golden era of low quality, shortly looped, 8-bit samples then this may be something for you. Over 10000 Protracker compatible tunes collected into significantly sized package: around 1.8 GB of uncompressed data. The oldest tracks reach slowly age of 30 years old, but there are quite new ones too. You can get it here:
New Footsteps pack 2 is available in Unity3D Asset Store. It contains over 2200 unique oneshot sounds of walking on surfaces like: grass, dry leafs, dirt road, forest cover, hay, mud, puddle, stones, bricks rubbish, glass grit, dirty cardboard, rusty wire fence, thickets, snow, ice.
More detailed description can be found on asset page in store.