Remembering playing the good old Doom and Doom 2 back in the 90s? CodeImp have put together a nice tutorial on how to play Doom and Doom2 online using an app called Skulltag.
I can still remember playing Doom, which was actually my first first person 3d shooting game. It wasn’t long after that Id came up with Quake and followed by Sierra’s Half Life (and ConunterStrike!) that we start to experience just how great 3d shotting games really are. Man, thinking abou it, games had really come a long way to what it is today!