The newgrounds audio rules says to write what you used:
-FL studio
-FLEX
-Chior Ahh instrument
-Chior Ohh instrument
-Autogun
-Fruity Love Philter
-Fruity Reeverb 2
-Fruity Blood Overdrive
-Soundgoodizer
-Fruity Fast Dist
-Fruity Parametric EQ 2
-Drums and FX are from FL and Cymatics
You may only use this piece for commercial purposes if your work is a web-based game or animation, otherwise you must make specific arrangements with the artist.
* Contains third-party samples.
Excercise caution when using it, refer to author comments / contact the author for details.