Campaign: This game introduced a new character, the arbiter! The story of halo 2 had more depth as it went onto why the covenant really wanted to activate halo, The campaign missions were highly entertaining and challenging. You had to kill the three liars and that was the objective of the game. Brutes were a new type of enemies in the game which were a brutal and great addition.
Multiplayer: This game did what halo 1 could not, it brang a bunch of new game modes, better maps and playable elites. If you enjoyed any of the halo game's multiplayer this game will have it. It required real skill to defeat enemy teams. If you get a chance to play this, you will be in for a treat.
Overall: This game definitely deserves a 9.5