You could do a similar style of hacking in Dark Forces 2, which had "cog files" that were controlled client side and let you change the projectile of any weapon

You could do a similar style of hacking in Dark Forces 2, which had "cog files" that were controlled client side and let you change the projectile of any weapon. At first it was fun to replace your pistol bullets with rockets, or have your rocket launcher shoot light sabers. Eventually we realized you could actually make structures like bridges and stairs shoot out of your weapon, so it created this minecraft/gary's mod meta game of building platforms and structures out of your weapons, a decade before those came out. Fun times and definitely helped me on my career towards software.