The mod seems to retouch every aspect of the game including the engine, weapon mechanics, and animations. Templar GFX Modding is responsible for the mod, which can be found over on ModDB. Now, a modder has taken it upon themselves to overhaul the Aliens game into what people originally hoped Colonials Marine was going to be.
Aliens: Colonial Marines launched in 2013 to an onslaught of negative reviews and criticism.