Half life 2 is much more enjoyable, it has great replay value, and great puzzles to solve.
The gameplay is great, too.
Halo 3 seemed like another excuse to fill the halo 2 hype with a run and gun.
Not "bad" but still, it's really doesn't last long.No thanks.
Half Life =/= Halo
Half Life is more of a single player adventure fps where you gotta do stuff that takes skill and get to the end of the game and wish for episode 3
Halo 3, beat game on legendary so you can go show off and stuff and kill people online
sweet bloody star merry 
What the hell
