This game is overrated.
Halo 3 is a game which supports both Multiplayer and Singleplayer, and is only available on the Xbox 360. Previous games of Halo did considerably well, but not good enough to be considered as a 'Awesome' FPS game. Halo 3 is the first in the Halo Series to be introduced to the Xbox 360.
The fun factor for Halo 3.
Halo 3's fun factor lies on its variety of Alien or Human weapons. For example, the Humans have their Assault Rifle, Battle Rifle, Beam Rifle and Frag Grenade while the Aliens have their Energy Sword, Needler, Plasma Pistol and the Plasma Grenade. Their variety of powerful and useless weapon variety gives the game a +1.
Control and Gameplay.
The control, like all the other FPS for Xbox 360, are basically the same, except for other minor changes. Playing a FPS game on a controller is harder compared to playing the game on a PC, which has the mouse and the keyboard, allowing easy aiming and more steady movement. The Gameplay is like any other FPS games on a X360, but the game interface looks much more cluttered up compared to Call of Duty 4: Modern Warfare.
Graphics.
Halo 3's graphics on a regular Xbox 360 is something like Crysis on a PC with all the options maxed out (High Detail etc;). This makes Halo 3 a very outstanding game in term of graphics. But the multi-coloured aliens are a slight-problem. Purple on a Green Background? Ugh.
Conclusion.
Even though the review seems to say Halo 3 is a impressive game, it's really not what its all cracked up to be. Halo 3 does not deserve all the editors choice at all because It's probably 1 level lower than other FPS such as Crysis, COD 4 etc;. I wouldn't recommend people buying it, but it's your choice.