It's testament to Halo's design that nearly any weapon featured in the game could have appeared on this list. Sadly for the Energy Sword, Gravity Hammer and Battle Rifle, there can be only one. It might seem odd for a handgun to be so prominent in a game filled with powerful weapons but Halo's Pistol is mightily impressive for a variety of reasons. It has a 2x scope which makes it incredibly accurate, even at long range. Sure, it's not going to out-shoot a Sniper Rifle but in the right hands, it can score headshots from all across a map. On game-modes like SWAT (where there are no shields and headshots are a one hit kill), it's an amazingly efficient killing tool. Even in the Campaign, no weapon is as ruthless or efficient at wiping out low level Covenant than the Pistol; seriously, have you ever heard of a secondary weapon this dominant? Sure, the power weapons are always going to be more popular but the original Handgun has it's own special place in fans hearts. How many other games can you name which are more fun when you limit yourself to Pistols only? It's awesome powers have since been tamed but the original Handgun will always bring back fond Halo memories.
I have an addiction to achievements, a craving for new bands and a dream to become Captain America. I once finished second in a Mario Kart 7 tournament so I'm kind of a big deal.