*BLAM*
...let's try this again...
...Halo is nothing compared to the awesome power which is Half-life...For one...HL has the biggest and widest storyline I've seen...(HL1 had 2 expansions and HL2 is getting one too...fairly soon too!

)
*Shrugs*
...I just like HL better...Halo was more..."Shoot! Chuck 'Nades! Drive around! Shoot Some more! Chuck more 'nades! And follow the arrow to where you're supposed to go!" Half life on the other hand...Had more of a plot then, "Shut down Halo or we're fuXored!" Sure Half-life had a similar plot device, "Kill Nahilith to stop all the **** happening at Black Mesa...OOPS! So Solly! You just fuXored the world by doing that!"
And Half-life 2 picks up after that...And Halo didn't have that many puzzles in it...just kill things to trigger events...
*shrugs again*
...I'm done...off I go again...