We were originally planning to create some sounds but rapidly realised how much time it would take to record clean, crisp versions of all the sounds we thought we would want.
I spent some time sifting through loads of free sites, but most of the interfaces were terrible and it took forever just to preview a sound. The biggest worry I had with those sites was that sounds on there might not be properly attributed or worse still, completely ripped-off.
In the end, after tearing my hair out going through ad-infested sites, I came across Soundsnap. Sounds were really easy to preview and sound professional, plus $99 for 100 sounds (downloadable within a 3-year period) seemed more than reasonable after slogging through subpar sounds for hours.
With an upsurgence in the amount of pre-created, extremely-affordable assets available for games, I think tiny developers might do well to consider purchasing assets that do not fit in your base skill sets — ie we have art design and code (and music) covered, but no sound design. Just browse through the assets available on the Unity Store, for example — many are completely free or cost under $5. There are some outstanding examples from the likes of Bitgem (not affiliated with them in any way, I just think their art is really nice for low poly. Good reference too).
YMMV as some 3D art assets that I’ve looked at are a bit of a mess under the surface and may need a lot of optimization or clean-up for your game to run smoothly.
Note: this is just my personal opinion and we receive no benefit at all from linking to them.
Always remember to check the licensing policies!