Looking for some good Xbox games..

out of the ones i have in my opinion that is good.  I dont have Ghost recon of Raven shield so i wouldnt know.  Halo is the one i have played the most.  I was just posting my opinion.  
Yeah...that's a good game....tough, but a good one.

I know it's not an FPS, but Splinter Cell: Pandora Tomorrow is excellent as well.
Halo is good, its like starwars really, no sex... but it has minimal cursing, B and S words and has some blood splatter, but no guts or dismemberment.