This reminds me of Instagib mode in UT ... same gameplay twist: since everyone is on an even playing field with a hitscan instakill gun, accuracy and agility were much more important
Instagib was my favorite mode back in UT2003/2004. Really forced you to hone your twitch muscles. When you and your opponent were both missing each other, it only upped the frantic tension until one of you bursts into giblets!
