Alongside the graphical assets for Stone Age Skirmish, SFX were also required. BGM was optional, but I opted to include it anyway.
Here is the list of SFX and the one song from the game.
Player shooting SFX
Enemy shooting SFX
Hit player/enemy SFX
BGM
The music was made in Synthfont, using the Arachno soundfont.
The SFX were all obtained from free sources.