the noise of the rotors (they rotate), the voice is taken from the Russian version of Half-life 2, the new cannon shots (they are common with the M16) are taken from the Star Wars Jedi Knight: Jedi Academy game,
the new explosion sound (with echo) when falling, the bottom red lights glow at night.
Installation just drop the “сop dron” folder into the modloader folder.
Credits:
iam3d Jarone SergeDV DevNoBat