Universal Sound FX (USFX) is an affordable and evolving sound effect library designed for independent game developers. The library contains thousands of sounds with a wide variety suitable for any game genre. The sound effects can be used royalty free in commercial games and are also suitable for rapidly prototyping new game ideas and during game jams (use as place holders or keep them for your final release.)
USFX is in the “Early Release” phase which is also reflected by the price - many sound categories and game genres are yet to be covered. The ultimate goal is for USFX to become the most versatile library around covering as many game genres as possible. Being an early customer rewards you with free updates of this library as it matures.
Price: $15 (intro price)
Visit http://www.universalsoundfx.com - purchase on site or in the Unity asset store.